(1)It is hereby declared that any jurisdiction conferred on a magistrates' court by virtue of section 20 or 21 of this Act is exercisable notwithstanding that the proceedings are brought by or against a person residing outside England and Wales.
(2)Subject to subsection (3) below, a magistrates' court may, if it is satisfied that the respondent has been outside the United Kingdom during such period as may be prescribed by rules, proceed on an application made under section 20 or 21 of this Act notwithstanding that the respondent has not been served with the summons; and rules may prescribe any other matters as to which the court is to be satisfied before proceeding in such a case.
(3)A magistrates' court shall not exercise its powers under section 20 of this Act so as to increase the amount of any periodical payments required to be made by any person under this Part of this Act unless the order under that section is made at a hearing at which that person appears or the requirements of section 47(3) of the [1952 c. 55.] Magistrates' Courts Act 1952 with respect to proof of service of summons or appearance on a previous occasion are satisfied in respect of that person.