In this section "income payments agreement" means a written agreement between a bankrupt and his trustee or between a bankrupt and the official receiver which provides—
A provision of an income payments agreement of a kind specified in subsection (1)(a) or (b) may be enforced as if it were a provision of an income payments order.
While an income payments agreement is in force the court may, on the application of the bankrupt, his trustee or the official receiver, discharge or vary an attachment of earnings order that is for the time being in force to secure payments by the bankrupt.
The following provisions of section 310 shall apply to an income payments agreement as they apply to an income payments order—
An income payments agreement must specify the period during which it is to have effect; and that period—
An income payments agreement may (subject to subsection (5)(b)) be varied—
The court—