A local housing authority may not entertain an application for a grant,other than a disabled facilities grant, unless they are satisfied that, at thedate of the application, the dwelling, common parts or house or other buildingconcerned was provided not less than the relevant period before that date.
In subsection (1) above—
"provided" means provided by construction or conversion; and
"the relevant period" means ten years or such other periodas the Secretary of State may by order provide.