The approval will allow Scion to continue its research programme to test genes influencing plant growth, reproductive development, wood density and stability at a secure four-hectare site in Rotorua.
ERMA has imposed strict controls, including a requirement that no pollen or seed escape from the containment site.
Scion will have to remove all trees before they are capable of producing pollen or seed and implement a monitoring regime to ensure that any reproductive structures are detected before they mature.
Last month, 19 submitters presented their views at a public hearing in Rotorua.
