The Mixed Hereditaments (Certificate) (Amendment) Regulations 1981
The Secretary of State for the Environment, in exercise of the powers conferred by section 48(6) of the General Rate Act 1967 (a) and now vested in him (b) and all other powers enabling him in that behalf, hereby makes the following regulations:—

(a) 1967 c. 9; section 48 of the General Rate Act 1967 was amended by the Local Government, Planning and Land Act 1980 (c.65), section 33.
(b) S.I. 1970/1681.
(c) S.I. 1967/637.
(d) 1936 c.49.