An ineligible person is not entitled to be registered as a British citizen under any of the following provisions—
section 3(2) or (5) of the British Nationality Act 1981 (acquisition of British citizenship by registration: minors);
section 4(2) of that Act (acquisition of British citizenship by registration: British overseas territories citizens etc);
section 5 of that Act (acquisition of British citizenship by registration: British overseas territories citizens having connection with Gibraltar);
section 10(1) of that Act (registration as British citizen following renunciation of citizenship of UK etc);
section 13(1) of that Act (resumption of British citizenship).
In relation to an application for British citizenship made by or in relation to an ineligible person, the Secretary of State may not—
cause the person to be registered as a British citizen under any of the following provisions—
section 3(1) of the British Nationality Act 1981 (acquisition of British citizenship by registration: minors);
section 4A of that Act (acquisition of British citizenship by registration: further provision for British overseas territories citizens);
section 10(2) of that Act (registration as British citizen following renunciation of citizenship of UK etc);
section 13(3) of that Act (resumption of British citizenship);
grant to the person a certificate of naturalisation as a British citizen under section 6 of that Act (acquisition of British citizenship by naturalisation).