When carrying out an inspection report for cold rooms, how many people check the type of fitting used?

I have just been called out to check a light in a cold room and found that all the lights are standard 4 ft weatherproof fittings (the cold room is at -15) This job was done as a new installation a year ago, which means the COC is invalid, if there was one issued but i suppose the light fittings are not covered by the COC.