(1)When the external works specified in a group repair scheme are completed, the local housing authority shall, for the purposes of this section, send to each assisted participant a certificate specifying the date on which the works were completed to their satisfaction; and in subsection (2) below that date is referred to as “the completion date”.
(2)It shall be a condition of participation in a group repair scheme as an assisted participant that if, before the expiry of the period of three years beginning with the completion date, the assisted participant makes a relevant disposal (other than an exempt disposal) of the dwelling or other premises in which he had an owner’s interest at the date of the approval of the scheme, then, subject to subsection (6) below, he shall pay to the local housing authority on demand the outstanding balance determined in accordance with subsections (3) and (4) below or such lesser amount, being not less than one-third of that outstanding balance, as the authority may specify in the demand.
(3)Subject to subsection (4) below, in the case of any assisted participant, the outstanding balance referred to in subsection (2) above is the difference between—
(a)the cost, as notified to him under the scheme, of such of the external works specified in the scheme as relate to the house or other premises in which his owner’s interest subsisted; and
(b)the amount of the contribution in respect of that cost paid by him by virtue of section 129 above.
(4)If, in the case of any assisted participant, the cost of the external works relating to the house in which he had an owner’s interest falls to be apportioned as mentioned in subsection (2) of section 129 above, the reference in subsection (3) above to the cost of the works relating to the house shall be construed as a reference to that part of the cost which is apportioned to the part of the house in which his owner’s interest subsisted.
(5)Section 124 above applies for the purposes of this section as it applies for the purposes of sections 120 to 123 above, except that for any reference in that section to the dwelling there shall be substituted a reference to the house (or part of a house) or other premises in which the assisted participant had an owner’s interest.
(6)The duty of an assisted participant under subsection (2) above shall cease to apply if he makes such a disposal as is mentioned in that subsection either for no consideration or for consideration of an amount less than that either prescribed, or calculated in accordance with a formula prescribed, by regulations made by the Secretary of State.
(7)In subsections (3) to (5) above “house” shall be construed in accordance with section 129(2) above.