The Gender Recognition Act 2004 gives someone of either gender who is aged at least 18 the right to apply for a gender recognition certificate (GRC on the basis of their lived gender).
Mae Deddf Cydnabod Rhywedd 2004 yn rhoi'r hawl i unigolyn o'r naill rywedd neu'r llall sy'n 18 oed o leiaf wneud cais am Dystysgrif Cydnabod Rhywedd ar sail rhywedd bywyd y person ar y pryd.