23.—Where a court finds or declares in any proceedings that a care order for whatever reason is invalid, that court may of its own motion or on the application of any person refuse to exercise any power to order the delivery or return of the child to a parent or any other person if the court is of opinion that such delivery or return would not be in the best interests of the child and in any such case the court, of its own motion or on the application of any person, may—

(a) make a care order as if it were a court to which an application had been made by F98[the F99[Child and Family Agency]] under section 18,

(b) make an order remitting the matter to a justice of the District Court for the time being assigned to the district court district where the child resides or is for the time being or was residing or was at the time that the invalid order was made or the application therefor was made; and where the matter has been so remitted F98[the F99[Child and Family Agency]] shall be deemed to have made an application under section 18,

(c) direct that any order under paragraph (a) shall, if necessary, be deemed for the purposes of this Act to have been made by a justice of the District Court for the time being assigned to a district court district, specified by the court, or

(d) where it makes an order under paragraph (b), make a temporary order under paragraph (a) pending the making of an order by the court to which the matter or question has been remitted.