(b) (i) Prohibition. Except where inconsistent with federal law, no written contract, entered into on or after the effective date of this section shall contain a prohibited clause as defined in paragraph two of subdivision (a) of this section.
(ii) Exceptions. Nothing contained in this section shall be construed to impair or prohibit an employer from incorporating a non-prohibited clause or other mandatory arbitration provision within such contract, that the parties agree upon.
(iii) Mandatory arbitration clause null and void. Except where inconsistent with federal law, the provisions of such prohibited clause as defined in paragraph two of subdivision (a) of this section shall be null and void. The inclusion of such clause in a written contract shall not serve to impair the enforceability of any other provision of such contract.
(c) Where there is a conflict between any collective bargaining agreement and this section, such agreement shall be controlling.