Cooling periods are a part of Iron Shield project, a series of protocols and enhancements all designed to protect QUOINE clients from potential threats - both external & internal to the safety of client's assets. Cooling periods blocks prohibit users from withdrawing funds right after updating one security setting of their account.
Consecutive updates in security settings are also restricted. For example, you cannot disable 2FA right after just having your password reset. Similarly, you cannot set up 2FA right after having it disabled.
Cooling periods will also block withdrawal requests from being approved and processed for 3 days after any of the above security settings is updated.