Paragraph 1 I1

so far as exercisable by the Secretary of State or the Treasury, or by a Minister of the Crown acting jointly with a Northern Ireland department, is exercisable by statutory instrument, and

so far as exercisable by a Northern Ireland department (other than when acting jointly with a Minister of the Crown), is exercisable by statutory rule for the purposes of the Statutory Rules (Northern Ireland) Order 1979 (SI 1979/1573 (NI 12)) (and not by statutory instrument).