commissioning "commissioning" means the inspection, tests and trial operations carried out on an equipment or installation or any part of it to verify and ascertain that the equipment or installation has been manufactured, fabricated, constructed, installed, set or adjusted according to the relevant safety, operational and performance requirements so that it is ready to be used, worked or operated; PU(A) 192/1998 - ELECTRICITY (AMENDMENT) REGULATIONS 1998 3. Amendment of Second Schedule.