Here's a first, I have a question regarding Domestic 3 signature EICs, not having much to do with Domestic for a very long time way before the onset of the introduction of the QS, as I understand it the 3 signatures required are: the Installation designer, the Installer and the QS, before the QS actually signs off the cert, does He/She have to carry out any testing? or is it just a case of checking the cert to ensure it has been filled out correctly?