17. —(1) F13[…]

(2) F13[…]

(3) Notwithstanding section 107 of the Principal Act, a housing authority shall, before making an application for a warrant under subsection (1) of that section in respect of a house sold or leased by them, give to a mortgagee in whose favour a mortgage on the house has been effected not less than two months' notice in writing of the authority's intention to make the application, and every such notice shall state the grounds on which the application is to be based.