(1) For the purposes of this Part -

"attachment of earnings order" means an order directing that an employer deduct from the maintenance debtor’s earnings, at the times specified in the order, periodical deductions of the appropriate amounts specified in the order, having regard to the normal deduction rate and the protected earnings rate;

"court" means - (a) the High Court, in respect of an application under this Part made by a person on whose application the High Court has made an antecedent order, (b) the relevant Circuit Court, in respect of an application under this Part made by a person on whose application that court has made an antecedent order, and (c) the District Court, in respect of an application under this Part made by - (i) a person on whose application the District Court has made an antecedent order, or (ii) a District Court clerk to whom payments are required to be made under an antecedent order;