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 Sec. 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 Sec. 133.45(c).