Glacier Vault Lock and Policy Changes?

Vault Locking is comprised of a two-step process – Initiate (InitiateVaultLock) and Complete (CompleteVaultLock). Once a policy has been built and initiated you have 24 hours to issue an Abort (AbortVaultLock) which will delete the in-progress policy and provide the opportunity to modify the policy before locking it down. Once modifications are made it is required to issue the Initiate command again which restarts the 24 hour window in which the policy can be aborted or completed. Once the Complete command is issued the policy for that vault becomes immutable.