StacksVerified U.S. regulatory reference

14 CFR §27.1559

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.