In this Part "enactment" includes -
(a) an enactment contained in subordinate legislation within the meaning of the Interpretation Act 1978;
(b) an enactment contained in, or in an instrument made under, an Act of the Scottish Parliament;
(c) an enactment contained in, or in an instrument made under, a Measure or Act of the National Assembly for Wales;
(d) an enactment contained in, or in an instrument made under, Northern Ireland legislation.