# Considerations for pull-time update exclusions
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Consider the following when using pull-time update exclusions:
+ The default page size for listing exclusions is 100. You can use pagination with `maxResults` and `nextToken` parameters.
+ Only valid IAM role ARNs in the correct ARN format are accepted.
+ If you try to create an exclusion that already exists, you'll receive an `ExclusionAlreadyExistsException` error. If you try to delete an exclusion that doesn't exist, you'll receive an `ExclusionNotFoundException` error.