2.1. All the definitions given in the latest series of amendments to UN Regulation No. 48 in force at the time of application for type approval shall apply, unless otherwise specified in this Regulation or in the pertinent installation UN Regulations Nos. 53, 74 and 86. a1c0
2.1. The definitions given in the latest series of amendments to UN Regulations Nos. 48 in force at the time of application for type approval shall apply, unless otherwise specified. a0c0