14 C.F.R. § 25.1543 Instrument markings: general.
Title 14 - Aeronautics and Space
For each instrument— (a) When markings are on the cover glass of the instrument, there must be means to maintain the correct alignment of the glass cover with the face of the dial; and (b) Each instrument marking must be clearly visible to the appropriate crewmember. [Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25–72, 55 FR 29786, July 20, 1990]
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart G—Operating Limitations and Information
Markings and Placards
§ 25.1543 Instrument markings: general.
