56.—(1) Where a magistrates' court imposes imprisonment on any person, it may order that the term of that imprisonment shall commence on the expiration of any other term of imprisonment imposed by that or any other court; but where a magistrates' court imposes two or more terms of imprisonment to run consecutively the aggregate of those terms shall not, except as provided by this Article or any other enactment, exceed twelve months.
(2) Where two or more terms of imprisonment in respect of indictable offences tried summarily are imposed to run consecutively the aggregate of those terms shall not exceed eighteen months.
(3) Without prejudice to section 149 (3) of the Customs and Excise Management Act 1979 or section 63 of the Miscellaneous Transferred Excise Duties Act (Northern Ireland) 1972F1, where a person has been sentenced by a magistrates' court to imprisonment in default of payment of, or in default of sufficient distress to satisfy, a sum adjudged to be paid by a conviction the court may order that the sentence shall begin at the expiration of any term of imprisonment imposed for that offence on that person in addition to such sum, but so that the aggregate term of sentences of imprisonment to which this paragraph applies shall not where a person is convicted of a summary offence exceed twelve months or where a person is convicted of an indictable offence tried summarily exceed eighteen months.