Which certification statements must use AR5 GWP values?

Which certification statements must use AR5 GWP values?

All monitoring, verifications and requests for performance certification of Certified products and/or Impact Statements for the period starting 01 January 2021 shall use the AR5 GWP values for calculating emission reductions and removals accrued by GS4GG projects and PoAs. This requirement is applicable to all emission reductions and removals accrued by GS4GG projects and PoAs irrespective of the Gold Standard version and project cycle stage.