17 C.F.R. § 48.10
(b) Option contracts on previously approved futures contracts.
(1) If the option is on a futures contract that is not a linked contract, the option contract may be made available for trading by direct access by filing with the Commission no later than the business day preceding the initial listing of the contract:
(2) If the option is on a futures contract that is a linked contract, the option contract may be made available for trading by direct access by filing with the Commission no later than the business day preceding the initial listing of the contract: