Since April 1, 1992, all gas supply companies, gas installers and contractors must be registered with the Gas Authority (the Director of Electrical and Mechanical Services) in order to carry out their operations.

• 由一九九二年四月一日起，所有气体供应公司、气体装置技工及工程承办商均须向气体安全监督(机电工程署署长)注册，方可从事与气体有关的业务或工程。