Correct as at 29th March 2020. It may be superseded at any time.
Extract taken: from NZTA Vehicle Portal > VIRMs > Entry certification > Reference materials > VIA and IMVIA Exhaust emission compliance certificates
77 VIA and IMVIA Exhaust emission compliance certificates
The VIA (formerly IMVIA) ceased issuing exhaust emission compliance certificates from 28 December 2018. Should any VIA emission certificates be presented with issue dates later than 28 December 2018 or for vehicles that may have been imported after that date, please contact the Transport Agency (email@example.com) before accepting them.
Page amended 1 June 2019 (see amendment details).