4Any dispute arising as to whether or not—
(a)the terms of employment with one of the new statutory bodies are, or would be, less favourable to a person than those on which he was employed at the time when the employment was offered to him ; or
(b)whether or not a person's refusal of employment with one of those bodies was reasonable,
and any dispute concerning the compensation referred to in paragraph 3, shall be referred to and determined by an industrial tribunal.