The Gender Recognition Act 2004 allows transgender people to obtain legal recognition for their 'acquired gender' allowing individuals to obtain a change in sex on birth certificates. Under special provisions of the Civil Partnership Act 2004, in such situations a couple may dissolve their marriage and enter into a civil partnership the same day, and under the provision of the Civil Partnerships, Marriages and Deaths (Registration etc) Act 2019 a same-sex marriage can be converted to an opposite-sex civil partnership. Alternatively they can stay married or in a civil partnership if their spouse signs a statutory declaration that they agree to the gender change changing the opposite sex marriage into a same sex marriage or vice versa.