14 C.F.R. § 121.489 Flight time limitations: Other commercial flying.
Title 14 - Aeronautics and Space
No pilot that is employed as a pilot by a certificate holder conducting flag operations may do any other commercial flying if that commercial flying plus his flying in air transportation will exceed any flight time limitation in this part. [Doc. No. 28154, 61 FR 2612, Jan. 26, 1996]
Title 14: Aeronautics and Space
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
Subpart R—Flight Time Limitations: Flag Operations
§ 121.489 Flight time limitations: Other commercial flying.