Atlas / Regulations / Legal Interpretations Legal Interpretation 1991-020 Current · Issued 06/24/1991 Rizner View PDF on drs.faa.gov ↗ (authoritative document) 14 CFR sections this interpretation addresses § 1.1 Not in our cache — verify on eCFR § 61.31 Not in our cache — verify on eCFR § 91.21 Not in our cache — verify on eCFR § 91.109 Not in our cache — verify on eCFR