This operation sets and then enacts a data retrieval policy in the region specified in the PUT request. You can set one policy per region for an AWS account. The policy is enacted within a few minutes of a successful PUT operation.
The set policy operation does not affect retrieval jobs that were in progress before the policy was enacted. For more information about data retrieval policies, see Amazon Glacier Data Retrieval Policies (http://docs.aws.amazon.com/amazonglacier/latest/dev/data-retrieval-policy.html).