At any time while a maintenance order is registered under this Part of this Act in any court, an application for the cancellation of the registration may be made in the prescribed manner to the prescribed officer of that court by or on behalf of the person entitled to payments under the order ; and upon any such application that officer shall (unless proceedings for the variation of the order are pending in that court), cancel the registration, and thereupon the order shall cease to be registered in that court.

Where, after a maintenance order has been registered under this Part of this Act in a court of summary jurisdiction in England or Northern Ireland or a sheriff court in Scotland, it appears to the appropriate authority (as defined by section seventeen of this Act), upon application made in the prescribed manner by or on behalf of the person liable to make payments under the order, that that person has ceased to reside in England, Northern Ireland or Scotland, as the case may be, the appropriate authority may cause a notice to that effect to be sent to the prescribed officer of the court in which the order is registered ; and where such a notice is sent the prescribed officer shall cancel the registration of the maintenance order, and thereupon the order shall cease to be registered in that court.

Where the prescribed officer of any court cancels the registration of a maintenance order under this section, he shall give notice of the cancellation in the prescribed manner to the prescribed officer of the court by which the order was made and the last-mentioned officer shall cause particulars of the notice to be registered in his court in the prescribed manner.

Except as provided by subsection (5) of this section, the cancellation of the registration of a maintenance order shall not affect anything done in relation to the maintenance order while it was registered.

On the cancellation of the registration of a maintenance orders any order made in relation thereto under subsection (2) of section nineteen of this Act shall cease to have effect; but until the person liable to make payments under the maintenance order receives the prescribed notice of the cancellation, he shall be deemed to comply with the maintenance order if he makes payments in accordance with any order under the said subsection (2) which was in force immediately before the cancellation.

Where, by virtue of ah order made under subsection (2) of section nineteen of this Act, sums payable under a maintenance order registered in a court of summary jurisdiction in England or Northern Ireland are payable through the collecting officer of any court, that officer shall, if the person entitled to the payments so requests, make an application on behalf of that person for the cancellation of the registration.