# Document history
<a name="doc-history-ct"></a>

The following table describes the important changes in each release of the *AMS Change Type Reference Guide*. For notification about updates to this documentation, you can subscribe to an RSS feed.

| Change | Description | Date | 
| --- |--- |--- |
| [New change type: VPN \$1 Replace Site-to-Site VPN tunnel](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 VPN \$1 Replace Site-to-Site VPN tunnel](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2sav5hzk5twk4-schema-section) | March 30, 2026 | 
| [New change type: VPC \$1 Delete route](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 VPC \$1 Delete route](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1nusoameibz5p-schema-section) | March 30, 2026 | 
| [New change type: Remediate DNS scavenging issue](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Directory Service \$1 Remediate DNS scavenging issue](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3k67klld7cimj-schema-section) | March 30, 2026 | 
| [New change type: RDS Database Stack \$1 Update parameter group of DB instance or cluster](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 RDS Database Stack \$1 Update parameter group of DB instance or cluster](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0p1oqt4xcp1cv-schema-section) | March 30, 2026 | 
| [Updated change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 EBS Volume \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-16xg8qguovg2w-schema-section) | January 8, 2026 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Security group \$1 Authorize egress rule](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0lqruajvhwsbk-schema-section) | December 26, 2025 | 
| [New change type: Load Balancer (Elastic Load Balancing) Stack \$1 Update Deletion Protection](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Load Balancer (ELB) stack \$1 Update deletion protection](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-28yh0fnzhubnh-schema-section) | December 26, 2025 | 
| [New change type: CloudWatch \$1 Modify Log Retention Period](#doc-history-ct) | [ Management \$1 Monitoring and notification \$1 CloudWatch \$1 Modify log retention period](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0vfx8rwd1mcnn-schema-section) | December 26, 2025 | 
| [New change type: AWS Resource Access Manager (AWS RAM) \$1 Create Resource Share (managed automation)](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Resource Access Manager (RAM) \$1 Create resource share (managed automation)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-054ysptoo4gyk-schema-section) | December 26, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Identity and Access Management (IAM) \$1 Delete or deactivate access key](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-37qquo9wbpa8x-schema-section) | December 16, 2025 | 
| [New change type: Stack from CloudFormation Template \$1 Delete Failed Stack (Managed Automation)](#doc-history-ct) | [ Management \$1 Custom Stack \$1 Stack From CloudFormation Template \$1 Delete Failed Stack (managed automation)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0ntpkt9wntdfs-schema-section) | December 16, 2025 | 
| [New change type: GuardDuty Suppression Rules \$1 Create (Managed Automation)](#doc-history-ct) | [ Management \$1 Monitoring and notification \$1 GuardDuty suppression rules \$1 Create (managed automation)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-26swglg6rodzt-schema-section) | December 16, 2025 | 
| [Updated change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 RDS database stack \$1 Create from snapshot](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-20san5sgtwd9e-schema-section) | November 14, 2025 | 
| [New change type: DNS \$1 Update Group Managed Service Account](#doc-history-ct) | [ Management \$1 Directory Service \$1 DNS \$1 Update group managed service account](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-15gyrpzjx1yac-schema-section) | October 28, 2025 | 
| [Updated the execution mode for manual CTs](#doc-history-ct) |  Updated the execution mode to Managed automation for manual CTs. | October 24, 2025 | 
| [New change type: VPC \$1 Create DHCP Option Set](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 VPC \$1 Create DHCP option set](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-18rsjua1zosvo-schema-section) | October 22, 2025 | 
| [New change type: Stack \$1 Remove Stack Resources](#doc-history-ct) | [ Management \$1 Standard stacks \$1 Stack \$1 Remove stack resources](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-03mv2mypai537-schema-section) | October 22, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Application Load Balancer \$1 Remove ALB listener certificates](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0tpbr6lfa3zng-schema-section) | October 2, 2025 | 
| [New change type: EC2 Instance Stack \$1 Update IMDS Version (review required)](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EC2 instance stack \$1 Update IMDS version (review required) ](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1xymw2hi94k1k-schema-section) | October 2, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EBS Volume \$1 Detach](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2d55p1d7z6w3d-schema-section) | September 25, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Security group \$1 Authorize ingress rule](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3j2zstluz6dxq-schema-section) | September 25, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Identity and Access Management (IAM) \$1 Update entity or policy (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-27tuth19k52b4-schema-section) | September 25, 2025 | 
| [Updated change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Identity and Access Management (IAM) \$1 Create entity or policy (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3dpd8mdd9jn1r-schema-section) | September 25, 2025 | 
| [Updated change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 RDS database stack \$1 Create option group (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-10yi1sd9nst1c-schema-section) | September 25, 2025 | 
| [Updated Tips section for RDS Database Stack \$1 Stop DB Instance](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 RDS database stack \$1 Stop DB instance](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-rds-database-stack-stop-db-instance.html) | September 25, 2025 | 
| [Updated Tips section for EBS Snapshot \$1 Delete](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EBS snapshot \$1 Delete](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-ebs-snapshot-delete.html) | September 25, 2025 | 
| [New change type: Update VPC Endpoint Policy](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 VPC endpoint \$1 Update policy (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-128mp7mbxobd0-schema-section) | September 25, 2025 | 
| [New change type: Update EC2 Instance Metadata Service (IMDS) Region Setting (review required)](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EC2 instance stack \$1 Update IMDS region-level default settings (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2o1knqxw39mkc-schema-section) | September 25, 2025 | 
| [New change type: Delete NAT gateway (review required)](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 NAT gateway \$1 Delete (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1rexstryxye1b-schema-section) | September 25, 2025 | 
| [New change type: Create ELB Listener Rule](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Load balancer (ELB) stack \$1 Create listener rule](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-18weo4vv83ynk-schema-section) | September 25, 2025 | 
| [Updated Tips section for Approve a CloudFormation ingest stack changeset](#doc-history-ct) | [ Management \$1 Custom Stack \$1 Stack from CloudFormation Template \$1 Approve Changeset and Update](https://docs.aws.amazon.com/managedservices/latest/ctref/management-custom-stack-from-cloudformation-template-approve-changeset-and-update.html) | September 15, 2025 | 
| [Updated expected execution duration](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EC2 instance stack \$1 Resize](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-ec2-instance-stack-resize.html) | September 5, 2025 | 
| [TOC Glossary link removed](#doc-history-ct) | [AWS Glossary](https://docs.aws.amazon.com/glossary/latest/reference/glos-chap.html). | August 8, 2025 | 
| [New change type: Target group delete (review required)](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Target group \$1 Delete (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0akjahmgqhu4u-schema-section) | July 23, 2025 | 
| [New change type: Directory Service Create AD SPN](#doc-history-ct) | [ Management \$1 Directory Service \$1 Computer object \$1 Create service principal name (SPN)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0ulaleq7ohuyq-schema-section) | July 23, 2025 | 
| [Updated change types' parameter option set: Restrict the selection of ELBSecurityPolicy-TLS-1-0-2015-04 as the SSL security policy](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Application Load Balancer \$1 Update](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1a1zzgi2nb83d-schema-section), [ Deployment \$1 Standard stacks \$1 High availability one-tier stack \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-09t6q7j9v5hrn-schema-section), [ Deployment \$1 Advanced stack components \$1 Listener \$1 Create (for ALB or NLB)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-14yjom3kvpinu-schema-section), [ Deployment \$1 Advanced stack components \$1 Application Load Balancer \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-111r1yayblnw4-schema-section) | July 10, 2025 | 
| [Updated change type description note: Target group delete (review required)](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EBS volume \$1 Detach](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2d55p1d7z6w3d-schema-section) | July 10, 2025 | 
| [New change type parameter: CreatePolicyAsInlinePolicy](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Identity and Access Management (IAM) \$1 Create entity or policy (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3dpd8mdd9jn1r-schema-section) | June 24, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Custom stack \$1 Stack from CloudFormation Template \$1 Continue update rollback](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-32r1igwrwag4i-schema-section) | June 24, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 VPC \$1 Manage subnet public IPv4 auto assignment](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1pqxczuw5uwu6-schema-section) | June 24, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Trusted Remediator \$1 Remediation configuration \$1 Update](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3kl2d1u40lrj8-schema-section)  New parameter: `PreconfiguredParameters` allows you to change the values of preconfigured parameters in Trusted Advisor checks in Trusted Remediator. | May 20, 2025 | 
| [Updated change type](#doc-history-ct) | [ Deployment \$1 AMS patterns \$1 Solution \$1 Deploy (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2jndrh7uit8uf-schema-section)  New parameter: `ExcludeAccounts` allows you to exclude application accounts from stack instance creation when creating the StackSet stack. | May 20, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 S3 storage \$1 Update public access](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0z8w5t4t1ti5m-schema-section) | May 20, 2025 | 
| [New change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Resource Access Manager (RAM) \$1 Create resolver rule share](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1jy64y7yt71m4-schema-section) | May 20, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 Security group \$1 Delete ](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-18r16ldqil6w9-schema-section) | April 30, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 EC2 instance stack \$1 Encrypt instance volumes](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0hahohe17csnc-schema-section)  New parameter: `CopyTagsToNewEncryptedVolumes`. | April 24, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Host security \$1 Trend Micro DSM \$1 Scan and get results (review required) ](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-08sgdn5zowyyl-schema-section) | April 22, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Host security \$1 Trend Micro DSM \$1 Remove Trend Micro EPS agent (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2iz9nvw8zlhst-schema-section) | April 22, 2025 | 
| [New change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 RDS database stack \$1 Create option group (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-10yi1sd9nst1c-schema-section) | April 22, 2025 | 
| [New change type](#doc-history-ct) | [ Deployment \$1 Advanced stack components \$1 Database Migration Service (DMS) \$1 Create target endpoint (kafka)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1mrqxscu15apz-schema-section) | April 22, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Standalone resources \$1 Load Balancer \$1 Delete](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2fuzb2l7hckrj-schema-section) | April 22, 2025 | 
| [Updated change type](#doc-history-ct) | [ Management \$1 Advanced stack components \$1 AMI \$1 Share (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1eiczxw8ihc18-schema-section)  A new parameter, `OrganizationalUnitARNs`, was added. | March 27, 2025 | 
| [Update change type walkthrough](#doc-history-ct) | [ Managed account \$1 DNS \$1 Migrate to Route 53 (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2tqi3kjcusen4-schema-section)  The Operation name was updated with "review required" to indicate that this is a manually run change type. | March 27, 2025 | 
| [New change type](#doc-history-ct) | [ Management \$1 Host security \$1 Trend Micro DSM \$1 Exclude files and folders (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3va4bkrxb9z42-schema-section)  Exclude specified files and/or folders from Trend Micro scanning. | March 27, 2025 | 
| [New change type](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3kl2d1u40lrj8-schema-section) | Update the remediation configuration for Trusted Remediator.  | March 19, 2025 | 
| [New change type](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1c7ch8z5phrjp-schema-section) | Request remediation of a Trusted Remediator finding.  | March 19, 2025 | 
| [New change type](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-10nh4ztyxu8kz-schema-section) | Enable or disable the Trusted Remediator service. | March 19, 2025 | 
| [Update change type walkthroughs](#doc-history-ct) |  [Management \$1 Managed landing zone \$1 Application account \$1 Confirm offboarding](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-2wlfo2jxj2rkj-schema-section) and [Management \$1 Managed landing zone \$1 Management account \$1 Offboard application account](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0vdiy51oyrhhm-schema-section)  Note added: After confirming the offboarding you have 48 hours to run the offboarding change type. If not run in 48 hours, the confirmation is dropped and the process must be restarted. | February 20, 2025 | 
| [Update change type walkthrough](#doc-history-ct) | [Management \$1 Custom Stack \$1 Stack from CloudFormation Template \$1 Remediate drift](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-3kinq0u4l33zf-schema-section)  The list of resources supported for this CT was added. | February 20, 2025 | 
| [New change type](#doc-history-ct) | [Management \$1 Host security \$1 Trend Micro DSM \$1 Update agent status (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0biqnokj25gkd-schema-section). | February 20, 2025 | 
| [New change type](#doc-history-ct) | [Management \$1 Host security \$1 Trend Micro \$1 Add User (review required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-24rl68y07m769-schema-section). | February 20, 2025 | 
| [Updated change type: Deployment \$1 Standalone resources \$1 EC2 instance \$1 Create for WIGS (Review Required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-36emj2uapfbu8-schema-section) | A note was added that, in order to use the AWS Marketplace AMI you must subscribe to the AMI from that account, and then agree to the terms of the AMI. AMS can not perform these actions for you because as a buyer you perform these actions yourself. | January 23, 2025 | 
| [New change type: Management \$1 Monitoring and notification \$1 SNS \$1 Update (Review Required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0zzf0fjz76jmb-schema-section) | Change type for requesting that AMS update an SNS topic in your account for you. Use this when you need extra help or communications about the SNS topic to update. | January 23, 2025 | 
| [New change type: Management \$1 Advanced stack components \$1 EBS snapshot \$1 Delete (Review Required)](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1vrnixswq1uwf-schema-section) | Change type for requesting that AMS delete EBS snapshots for you. Use this when you need extra help or communications about the snapshots to delete. | January 23, 2025 | 
| [New change type: Deployment \$1 Advanced stack components \$1 S3 access point \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1elb1vtam0ka5-schema-section) | Change type for creating an S3 access point.  | January 23, 2025 | 
| [New change type parameter](#doc-history-ct) |  [Deployment \$1 Advanced stack components \$1 S3 storage \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1a68ck03fn98r-schema-section) and [Management \$1 Advanced stack components \$1 S3 storage \$1 Update](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-1gi93jhvj28eg-schema-section)  Change types for creating and updating S3 storage, new parameter for tags.  | January 23, 2025 | 
| [Updated change type: Deployment \$1 Advanced stack components \$1 RDS database stack \$1 Create DB subnet group](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-17w6f6kzf6w51-schema-section) | "pattern" is removed from the `Keys` and `Tags` sections of the CT schema. | December 19, 2024 | 
| [Updated change type: Deployment \$1 AMS Resource Scheduler \$1 Solution \$1 Deploy](https://docs.aws.amazon.com/managedservices/latest/ctref/schemas.html#ct-0ywnhc8e5k9z5-schema-section) | Parameters `MemorySize` and `SchedulerFrequency` added to the CT schemas. Default values are `512MB` and `10 mins`, respectively. | December 19, 2024 | 
| [Updated change type: Management \$1 Advanced stack components \$1 Target group \$1 Detach instances](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-target-group-detach-instances.html) | A new version of this change type is now available. | November 21, 2024 | 
| [Updated change type: Management \$1 Advanced stack components \$1 S3 storage \$1 Update](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-s3-storage-update.html) | A new version of this change type is now available. | November 21, 2024 | 
| [Updated change type: Deployment \$1 Advanced stack components \$1 S3 storage \$1 Create](https://docs.aws.amazon.com/managedservices/latest/ctref/deployment-advanced-s3-storage-create.html) | A new version of this change type is now available. | November 21, 2024 | 
| [Updated change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-access-stack-admin-access-update.html) | The `ExpectedExecutionDurationInMinutes` was updated from `60` to `240` for the following 35 change types: ct-3dpd8mdd9jn1r ct-2epp05svrlwod (v1, v2, v3) ct-220bdb8blaixf ct-1oxx2g2d7hc90 (v1, v2) ct-2jndrh7uit8uf ct-1urj94c3hdfu5 ct-08avsj2e9mc7g ct-25v6r7t8gvkq5 ct-36emj2uapfbu8 (v1, v2) ct-211l2gxvsrrhy ct-2aaaqid7asjy6 ct-30j78u6li9aqr ct-27tuth19k52b4 ct-2zxya20wmf5bf (v1, v2) ct-05yb337abq3x5 ct-3ovo7px2vsa6n (v1, v2, v3) ct-27jjy5wnrfef2 ct-31eyj2hlvqjwu ct-0ttx8eh3ice91 ct-0fpjlxa808sh2 (v1, v2) ct-3cp96z7r065e4 ct-3memthlcmvc1b ct-0ixp4ch2tiu04 ct-1ay83wy4vxa3k ct-3qe6io8t6jtny ct-1pybwg08h8qsz ct-1706xvvk6j9hf ct-2r9xvd3sdsic0 ct-3gjfayulf5hhs ct-2tqi3kjcusen4 ct-1b8fudnqq7m8r ct-07jzw8bzd2on7 ct-2qjqju7h67s7w ct-2rnjx5yd6jgpt ct-34sxfo53yuzah  | November 21, 2024 | 
| [Updated change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-access-stack-admin-access-update.html) | Change Type description is updated to reflect that this CT is used to update read-only access. | October 24, 2024 | 
| [Updated change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-access-stack-read-only-access-update.html) | Change Type description is updated to reflect that this CT is used to update stack admin access. | October 24, 2024 | 
| [Updated change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-ebs-snapshot-delete.html) | The restriction to delete snapshots creates less than 60 days ago is changed to less than 30 days ago. Added an optional parameter for S3 URI of a bucket that belongs to the same AWS account. The invalid snapshots report is uploaded to this bucket. | October 24, 2024 | 
| [New change type](https://docs.aws.amazon.com/managedservices/latest/ctref/deployment-advanced-rds-database-stack-create-parameter-group-review-required.html) | New change type to create a custom RDS parameter group and optionally attach it to an existing RDS instance. | August 30, 2024 | 
| [Updated change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-managed-management-account-offboard-application-account.html) | Updated the change type description. | August 9, 2024 | 
| [Update change type](https://docs.aws.amazon.com/managedservices/latest/ctref/deployment-standalone-ec2-instance-create-for-wigs-review-required.html) | Version two of this change type is now available. | May 22, 2024 | 
| [New change type](https://docs.aws.amazon.com/managedservices/latest/ctref/management-advanced-s3-storage-add-event-notification.html) | New change type to add an event notification to the specified S3 bucket through direct API calls. | May 22, 2024 | 
| [Deprecated change type](#doc-history-ct) | Deployment \$1 Advanced stack components \$1 AWS Identity and Access Management (IAM) \$1 Create Entity or Policy (Read Permissions) | April 8, 2024 | 

## Earlier updates
<a name="earlier-updates"></a>

The following table describes the important changes to the documentation of the *AMS Change Type Reference Guide* prior to March 2024.
+ **API version: 2019-05-21**


****  
[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/managedservices/latest/ctref/doc-history-ct.html)