reg 15 Compliance procedures for series production
(1) A manufacturer of pressure equipment or assemblies which are manufactured by series production must ensure that procedures are in place to ensure that any pressure equipment or assemblies so manufactured will be in conformity with Part 2. (2) In doing so, the manufacturer must take adequate account of— (a) any change in pressure equipment or assembly design or characteristics; and (b) any change in a designated standard or in another technical specification by reference to which the ... declaration of conformity was drawn up.