In accordance with the CL:AIRE Gas Protection Verification Accreditation Scheme “Operation of the Gas Protection Verification Accreditation Scheme (GPVS)” all accredited individuals awarded Specialist Grade (SGPV) and Technician Grade (TGPV) are required to revalidate their registration every four years from the date of their award certificate by demonstrating that their competency is being maintained by providing a record of their Continuing Professional Development (CPD) for review.
Further guidance is available here: