policyName

Which named policy to read. Defaults to "default" when omitted (a read AWS Resource Access Manager makes on the owner's behalf resolves to "AWS_RAM" instead). Unlike writing, neither name is reserved on a read: the bus owner can read both. There is no fallback between the two, so a bus shared only through Resource Access Manager fails with ResourceNotFoundException until "AWS_RAM" is named explicitly. A well-formed name that is neither of the two fails with InvalidInputException.