Nothing in the [1984 c. 58.] Rent (Scotland) Act 1984 shall be deemed to affect the provisions of this Act relating to obtaining possession of a house with respect to which a closing order, or a demolition order has been made or to which a resolution passed under section 125 applies, or to prevent possession being obtained—
(a)of any house possession of which is required for the purpose of enabling a local authority to exercise their powers under any enactment relating to housing;
(b)of any house possession of which is required for the purpose of securing compliance with any byelaws made for the prevention of overcrowding;
(c)of any premises by any owner in a case where an undertaking has been given under this Part that those premises shall not be used for human habitation.