A local housing authority by whom a house is erected under the enactments relating to housing, whether with or without financial assistance from the government, shall secure—
(a)that a fair wages clause complying with the requirements of any resolution of the House of Commons for the time being in force with respect to contracts for government departments is inserted in all contracts for the erection of the house, and
(b)that, in except in so far as the Secretary of State may, in a particular case, dispense with the observance of this paragraph, the house is provided with a fixed bath in a bathroom.