17 C.F.R. § 240.12d1-6
Withdrawal of certification
An exchange may, by notice to the Commission, withdraw its certification prior to the time that the registration to which it relates first becomes effective pursuant to § 240.12d1-1.
An exchange may, by notice to the Commission, withdraw its certification prior to the time that the registration to which it relates first becomes effective pursuant to § 240.12d1-1.