Regulation 2 Interpretation Original text. Later amendments are not shown. In these Regulations “the principal regulations” means the Road Vehicles (Registration and Licensing) Regulations 1971f1. Annotations Footnotes f1 S.I. 1971/450.Relevant amending instruments are S.I. 1976/1680, S.I. 1986/607, S.I. 1986/1177 and S.I. 1993/1760. ← Regulation 1 Regulation 2 Regulation 3 →