17 C.F.R. § 200.28 Issuance of instructions.
Title 17 - Commodity and Securities Exchanges
(a) Within the spheres of responsibilities heretofore set forth, Division and Office Heads, and all Regional Administrators may issue such definitive instructions as may be necessary pursuant to this section. (b) All existing procedures and authorizations not inconsistent with this section shall continue in effect until and unless modified by definitive instructions issued pursuant to this paragraph.
Title 17: Commodity and Securities Exchanges
PART 200—ORGANIZATION; CONDUCT AND ETHICS; AND INFORMATION AND REQUESTS
General Organization
§ 200.28 Issuance of instructions.

