This section has effect as to the circumstances in which housing expenditure subsidy is payable to a development corporation and the Scottish Special Housing Association.

Subject to the provisions of this section, a development corporation shall be entitled to housing expenditure subsidy if for the year 1972-73 or any subsequent year there is an increase in the development corporation's expenditure per house which exceeds £6 or such other sum as the Secretary of State may by order from time to time determine.

In this section " the qualifying amount" means, in relation to the year 1972-73 and subsequent years, the excess mentioned in subsection (2) above multiplied by the number of development corporation houses.

If there is such a qualifying amount for any year (in this section called, in relation to the qualifying amount, " the base year") then for the base year and for each subsequent year housing expenditure subsidy shall be payable to the development corporation of an amount equal to the qualifying amount; and accordingly, housing expenditure subsidy for any year (later than 1972-73) may comprise elements by reference to qualifying amounts for two or more different base years.

Housing expenditure subsidy for which the base year is any of the years 1972-73 to 1977-78 shall not be payable for the year 1982-83 or any subsequent year, and housing expenditure subsidy for which the base year is 1978-79 or any subsequent year shall not be payable for more than five years (including the base year).

Section 14 of this Act shall apply to an order under subsection (2) above.

Subsections (2) to (7) of this section shall apply to the Scottish Special Housing Association as they apply to a development corporation except that in subsection (6) for the reference to development corporation houses there shall be substituted a reference to Scottish Special Housing Association houses.