GAS SAFE REGISTER™ Gas Safe Register became the official stamp for gas safety in Great Britain and the Isle of Man on 1 April 2009. CORGI gas registration is not valid or recognised by law in these regions. To work legally on gas appliances and installations you must be on the Gas Safe Register. Get Gas Safe registered now, you can’t work without it. anyone having gas mantainance or repairs done it will be worth asking if the engineer is gas safe registered as if they arent then any paperwork/certificate will not be valid and the engineer will be working on gas illegally.