In order for a depository to be a Permitted Depository:
The depository must (subject to § 22.9) be one of the following types of entities:
A bank located in the United States;
A trust company located in the United States;
A Collecting Futures Commission Merchant registered with the Commission (but only with respect to a Depositing Futures Commission Merchant providing Cleared Swaps Customer Collateral); or
A derivatives clearing organization registered with the Commission; and
The futures commission merchant or the derivatives clearing organization must hold a written acknowledgment letter from the depository as required by § 22.5 of this part.