CFR /  Title 14  /  Part 27  /  Sec. 27.1559 Limitations placard.

There must be a placard in clear view of the pilot that specifies the kinds of operations (such as VFR, IFR, day, night, or icing) for which the rotorcraft is approved. [Amdt. 27-21, 49 FR 44435, Nov. 6, 1984]