NABL accreditation management NABL Four-Year Accreditation Cycle 2026: What Labs Should Know Before a Premises Change Updated: 13 September 2026 Short answer: NABL announced in October 2024 that accreditation validity was increased from two years to four years. In 2026, NABL added a dedicated assessment programme for accredited conformity assessment bodies under the four-year cycle, amended NABL 100A, updated its procedure for dealing with changes in CAB premises on 31 August, and published a list of accredited laboratories whose accreditation cycle had been extended on 4 September. A four-year certificate should therefore not be interpreted as four years without oversight. Laboratories also should not treat relocation as a simple address edit. Premises, infrastructure, equipment, environmental control, scope and accreditation status need coordinated review. A longer accreditation cycle can reduce the temptation to think only in terms of a renewal ...