Article 2 Interpretation Original text. Later amendments are not shown. In these Rules “the principal Rules” means the Rules of Procedure (Air Force) 1972f1. Annotations Footnotes f1 S.I. 1972/419, amended by S.I. 1974/752, 1976/1772, 1977/94, 1981/1219, 1982/368, 1983/718, 1986/2125, 1987/2000, 1987/2172, 1989/2129. ← Article 1 Article 2 Article 3 →