CFR › Title 14 › Part 25 › §25.154314 CFR §25.1543Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkFor 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.