Regulation 1 Citation and commencementI1 Northern Ireland These Regulations may be cited as the Gas Safety (Installation and Use) Regulations (Northern Ireland) 2004 and shall come into operation on 29th March 2004. Annotations Commencement I1 Reg. 1 in operation at 29.3.2004, see reg. 1 ← Introduction Regulation 1 Regulation 2 →