A person (“P”) is entitled to be registered as a British citizen on an application made under this section if—
P meets the general conditions;
P was a citizen of the United Kingdom and Colonies immediately before commencement; and
P would have automatically become a British citizen at commencement, by the operation of any provision of this Act, had P's mother been married to P's natural father at the time of P's birth.
A person who is registered as a British citizen under this section is a British citizen by descent if the British citizenship which the person would have acquired at commencement (as mentioned in subsection (1)(c)) would (by virtue of section 14) have been British citizenship by descent.