1.—(1) Each enforcement authority may appoint as inspectors (under whatever title it may from time to time determine) such persons having suitable qualifications as it thinks necessary for carrying into effect these Regulations within its field of responsibility, and may terminate any appointment made under this paragraph.
(2) Every appointment of a person as an inspector under this paragraph shall be made by an instrument in writing specifying which of the powers conferred on inspectors by these Regulations are to be exercisable by the person appointed; and an inspector shall in right of appointment under this paragraph—
(a)be entitled to exercise only such of those powers as are so specified; and
(b)be entitled to exercise the powers so specified only within the field of responsibility of the appointing enforcement authority.
(3) So much of an inspector's instrument of appointment as specifies the powers which the inspector is entitled to exercise may be varied by the appointing enforcement authority.
(4) An inspector shall, if so required when exercising or seeking to exercise any power conferred by these Regulations, produce the instrument of appointment or a duly authenticated copy thereof.