Competency is proven by passing ACS assessment.
It isn't at all. Competency is not defined in law. You have been told countless times.
Accredited Certification Scheme (ACS)
ACS Certificates of Competence are only issued by Certification Bodies that conform to ISO.17024 and have been accredited by the United Kingdom Accreditation Service (UKAS). ACS Certificates of gas safety competence are valid for a maximum of 5 years.
