6Any reference in any Act, order or other document to the net rent or the standard rent of a dwelling-house to which the Rent and Mortgage Interest Restrictions Acts, 1920 to 1939, apply shall, in respect of any period after the commencement of the relevant year, be construed—
(a)in the case of the net rent, as a reference to such rent reduced by an amount equal to the relevant fraction of that rent; and
(b)in the case of the standard rent, as a reference to such rent reduced by an amount equal to the relevant fraction of the net rent of that dwelling-house:
Provided that the foregoing provisions of this paragraph shall not apply in relation to the net rent or the standard rent of any dwelling-house of which—
(i)the standard rent is the rent at which it was let on a lease entered into after the commencement of the relevant year or is an amount ascertainable by apportionment of the rent at which a property of which it formed part was let on such a lease as aforesaid (whether such an apportionment has been made or not);
(ii)the standard rent has been determined by the court under section six of the Rent and Mortgage Interest Restrictions (Amendment) Act, 1933, after such commencement;
(iii)the standard rent is the rent determined under section one of the Landlord and Tenant (Rent Control) Act, 1949, by the Tribunal after such commencement;
(iv)the standard rent is the amount deemed to be the standard rent by virtue of proviso (ii) to section one hundred and twenty-five of the Housing (Scotland) Act, 1950, and the tenancy referred to in that proviso begins after such commencement ;
(v)the standard rent is—
(a)under paragraph (a) of subsection (4) of section sixteen of the Reserve and Auxiliary Forces (Protection of Civil Interests) Act, 1951, or under paragraph (a) of subsection (5) of the said section, or under paragraph (a) of subsection (2) of section seventeen of the said Act, the rent payable in respect of a tenancy qualifying for protection beginning after such commencement or an amount to be ascertained by apportionment of the rent at which a property of which it formed part was let on such a tenancy as aforesaid; or
(b)the amount specified in a notice under paragraph (b) of subsection (5) of section sixteen of the said Act, being a notice served after such commencement; or
(c)the rent determined under paragraph (c) of subsection (5) of the said section sixteen by the Tribunal after such commencement,
and for the purposes of this sub-paragraph the references to the provisions of section sixteen of the said Act of 1951 shall include references to those provisions as applied by paragraph (b) of subsection (2) of section seventeen of the said Act or paragraph (b) of subsection (2) of section eighteen of that Act;
(vi)the standard rent is a rent determined under section twenty-six of the Housing (Repairs and Rents) (Scotland) Act, 1954, by the local authority after such commencement.