A registered person may issue a certificate of compliance accompanied by the required test report only after having satisfied himself or herself by means of an inspection and test that -
(a) a new electrical installation complies with the provisions of regulation 5(1) and was carried out under his or her general control; or
(b) an electrical installation which existed prior to the publication of the current edition of the health and safety standard incorporated into these Regulations in terms of regulation 5(1), complies with the general safety principles of such standard; or
(c) an electrical installation referred to in paragraph (b), to which extensions or alterations have been effected, that -
(i) the existing part of the electrical installation complies with the general safety principles of such standard and is reasonably safe, and
(ii) the extensions or alterations effected comply with the provisions of regulation 5(1) and were carried out under his or her general control.