14 C.F.R. § 61.7 Obsolete certificates and ratings.
Title 14 - Aeronautics and Space
(a) The holder of a free-balloon pilot certificate issued before November 1, 1973, may not exercise the privileges of that certificate. (b) The holder of a pilot certificate that bears any of the following category ratings without an associated class rating may not exercise the privileges of that category rating: (1) Rotorcraft. (2) Lighter-than-air. (3) Helicopter. (4) Autogyro.
Title 14: Aeronautics and Space
PART 61—CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS
Subpart A—General
§ 61.7 Obsolete certificates and ratings.
