(1) A collective agreement that conflicts or is inconsistent with this Act is void to the extent of the conflict or inconsistency.
(2) A provision of a collective agreement that
(a) requires a designated private sector partner or a contractor under section 5 to negotiate with a trade union to replace provisions of the agreement that are void as a result of subsection (1) of this section, or
(b) authorizes or requires the labour relations board, an arbitrator or any person to replace, amend or modify provisions of the agreement that are void as a result of subsection (1) of this section,
is void to the extent that the provision relates to a matter prohibited under this Act.