Sec. 25.1541 - General.
(a) The airplane must contain --
(1) The specified markings and placards;
and
(2) Any additional information,
instrument markings, and placards required for the safe operation if there
are unusual design, operating, or handling characteristics.
(b) Each marking and placard prescribed
in paragraph (a) of this section --
(1) Must be displayed in a conspicuous
place; and
(2) May not be easily erased,
disfigured, or obscured.