Amazon Glacier Vault Lock allows you to easily deploy and enforce compliance controls on individual Glacier vaults via a lockable policy. You can specify controls such as “Write Once Read Many” (WORM) in a Vault Lock policy and lock the policy from future edits. Once locked, the policy becomes immutable and Amazon Glacier will enforce the prescribed controls to help achieve your compliance objectives. To learn more, please read Amazon Glacier Vault Lock in the Amazon Glacier developer’s guide.