British Columbians who don't identify as male or female can now select an "X" on their I.D.
The third option can now be used on driver's licenses, identity cards, birth certificates and BC Service Cards.
The NDP announced the change last summer, following suit with several provinces across the country.
The provincial government says it's also working toward a non-medical model of gender identification to advance inclusivity.
To change a gender designation on an identity document, people born in BC must submit several documents to the Vital Statistics Agency, including a physician or psychologist’s confirmation form.
Once complete, the agency will issue a new birth certificate that can be used to change other identification cards.
Those born outside of BC can only change their BC-issued I.Ds, which excludes birth certificates.