10(1)An agreement is void in so far as it purports—
(a)to exclude or limit the operation of any of the provisions of this Act relating to access to employment, or
(b)to preclude a person from presenting a complaint to, or bringing any proceedings under those provisions before, an industrial tribunal.
(2)Sub-paragraph (1) does not apply to an agreement to refrain from instituting or continuing proceedings before an industrial tribunal where a conciliation officer has taken action in accordance with section 133(2) or (3) of the Employment Protection (Consolidation) Act 1978.