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(1)Sections 11 and 12 of this Act shall not affect the validity of an order made, or warrant issued, by a court before the coming into force of those sections for the committal of a person to prison in respect of any description of liability for which there remains power under either of those sections for that or any other court to commit, nor affect the continuance of any proceedings, or the exercise of any power, in connection with such an order or warrant; but subject to this any order or warrant of committal made or issued by any court before the appointed day shall on that day cease to have effect if it is one which, in consequence of the said sections 11 and 12, that court would, on and after that day, have no jurisdiction to make.
(2)Any person who immediately before the appointed day was in custody under an order or warrant which ceases to have effect by virtue of subsection (1) above shall be discharged.
(3)As from the appointed day, an attachment of earnings order made before that day under Part II of the Act of 1958 (including an order made under that Part of that Act as applied by section 46 or 79 of the [1967 c. 80.] Criminal Justice Act 1967) shall take effect as an attachment of earnings order made under the corresponding power in this Part of this Act, and the provisions of this Part of this Act shall apply to it accordingly, so far as they are capable of doing so.
(4)Rules of court may make such provision as the rule-making authority considers requisite—
(a)for enabling an attachment of earnings order to which subsection (3) above applies to be varied so as to bring it into conformity, as from the appointed day, with the provisions of this Part of this Act, or to be replaced by an attachment of earnings order having effect as if made under the corresponding power in this Part of this Act;
(b)to secure that anything required or authorised by this Part of this Act to be done in relation to an attachment of earnings order made thereunder is required or, as the case may be, authorised to be done in relation to an attachment of earnings order to which the said subsection (3) applies.
(5)In this section, " the appointed day" means the day appointed under section 54 of this Act for the coming into force of this Part of this Act.