14 C.F.R. § 133.49 Markings and placards.
Title 14 - Aeronautics and Space
The following markings and placards must be displayed conspicuously and must be such that they cannot be easily erased, disfigured, or obscured: (a) A placard (displayed in the cockpit or cabin) stating the class of rotorcraft-load combination for which the rotorcraft has been approved and the occupancy limitation prescribed in §133.45(a). (b) A placard, marking, or instruction (displayed next to the external-load attaching means) stating the maximum external load prescribed as an operating limitation in §133.45(c).
Title 14: Aeronautics and Space
PART 133—ROTORCRAFT EXTERNAL-LOAD OPERATIONS
Subpart D—Airworthiness Requirements
§ 133.49 Markings and placards.
