17 C.F.R. § 250.86 Prohibition of unauthorized transactions by subsidiaries.
Title 17 - Commodity and Securities Exchanges
Except as authorized by rule, regulation, or order of the Commission, no subsidiary company (including a mutual service company) of a registered holding company shall—whether or not pursuant to a contract heretofore or hereafter entered into—perform any service or construction for, or sell any goods to, any associate company thereof, or enter into any contract to do so.
Title 17: Commodity and Securities Exchanges
PART 250—GENERAL RULES AND REGULATIONS, PUBLIC UTILITY HOLDING COMPANY ACT OF 1935
Service, Sales and Construction Contracts
§ 250.86 Prohibition of unauthorized transactions by subsidiaries.