26 CFR § 1.1504-1
Definitions
June 25, 2020
The privilege of filing consolidated returns is extended to all includible corporations constituting affiliated groups as defined in section 1504. See the regulations under §1.1502 for a description of an affiliated group and the corporations which may be considered as includible corporations.
[T.D. 6500, 25 FR 12106, Nov. 26, 1960]