14 CFR 119.31 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 110.1 To Part 199) — Federal Aviation Administration, Department Of Transportation (Continued) (§ 110.1 To Part 199) — Air Carriers And Operators For Compensation Or Hire: Certification And Operations (§ 110.1 To § 139.343) — Certification: Air Carriers And Commercial Operators (§ 119.1 To § 119.73) — Certification, Operations Specifications, And Certain Other Requirements For Operations Conducted Under Part 121 Or Part 135 Of This Chapter (§ 119.31 To § 119.73) — Applicability.