(1) The grounds on which a civil union is void ab initio are set out in section 31 of the Family Proceedings Act 1980.
(2) A civil union may also be declared to be void ab initio on the grounds that, at the time the civil union was solemnised,—
(a) one of the parties to it was under the age of 16; or
(b) one of the parties to it was aged 16 or 17 and the consents required under section 19 had not be given.
(3) An application for a declaration under subsection (2) may be made under section 29 of the Family Proceedings Act 1980 as if the application were an application for an order declaring that the civil union was void ab initio on any of the grounds referred to in section 31 of that Act.
Compare: 1955 No 92 ss 15(4), 17(2), 18(7)