This document gives recommendations and specifies requirements for the elaboration of standardised reference methods of measurement for the field of stationary source emissions by CEN/TC 264, with or without reference to accreditation. It aims at facilitating in the working groups the elaboration and the harmonisation of the standards produced by CEN/TC 264. This document aims at ensuring that the specific requirements specified in prCEN/TS 15675 are taken on board in the individual measurement standards either directly or by reference to prEN 15259. This document specifies terms and definitions for use in other air quality standards. This document elaborates the CEN rules as given in CEN/BOSS and in the Internal Regulations Part 3 (PNE rules) in the field of stationary source emissions.