p) recommendations for servicing and maintenance of systems, including theperiods at which routine servicing should be carried out, have been revised;q) a new informative annex has been added to give advice on the Categories ofsystem typically installed in a variety of occupancies;r) separate recommendations are no longer provided for control and indicatingequipment and power supplies for small manual systems; such systems shouldcomply with all recommendations of the code of practice;s) the term “deviation” has been replaced with the term “variation”, to avoidany negative connotation associated with the term used to describe an aspectof system design that, for sound reasons, does not comply with therecommendations of this standard;t) the single certificate of commissioning has been replaced with separatecertificates of design, installation, commissioning, acceptance and verification