Every user shall ensure that the automatic controls and indicators of a steam generator, pressure vessel or
piping are arranged, installed, maintained and operated in accordance with the relevant health and safety standard which is incorporated into these Regulations under section 44 of the Act and used in the design and manufacture of the steam generator, pressure vessel or pressurized system: Provided that in the absence of such provisions, where automatic controls and indicators are installed, they shall be selected, arranged and
installed subject to the written approval of an approved inspection authority.