3. This Article and Articles 4 to 23 shall come into operation on 29th November 1999 and shall not have effect in relation to—
(a)working families' tax credit;
(b)disabled person’s tax credit; or
(c)decisions to which Article 4(6) of the Social Security Contributions (Transfer of Functions, etc.) (1999 Order) (Commencement No. 1 and Transitional Provisions) Order (Northern Ireland) 1999 applies.