Explanation:

Section 127(1) and (2) and section 128 of Code of Criminal Procedure – 
127. Alteration in allowance.—2 [(1) On proof of a change in the circumstances of any person, receiving, under section 125 a monthly allowance for the maintenance or interim maintenance, or ordered under the same section to pay a monthly allowance for the maintenance, or interim maintenance, to his wife, child, father or mother, as the case may be, the Magistrate may make such alteration, as he thinks fit, in the allowance for the maintenance or the interim maintenance, as the case may be.] (2) Where it appears to the Magistrate that, in consequence of any decision of a competent Civil Court, any order made under section 125 should be cancelled or varied, he shall cancel the order or, as the case may be, vary the same accordingly.
128. Enforcement of order of maintenance.—A copy of the order of 3 [maintenance or interim maintenance and expenses of proceedings, as the case may be,] shall be given without payment to the person in whose favour it is made, or to his guardian, if any, or to the person to 4 [whom the allowance for the maintenance or the allowance for the interim maintenance and expenses of proceeding, as the case may be,] is to be paid; and such order may be enforced by any Magistrate in any place where the person against whom it is made may be, on such Magistrate being satisfied as to the identity of the parties and the non-payment of the 5 [allowance, or as the case may be, expenses, due.