(a) Any employee whose compensation is at a rate that is in violation of section three of this article has the right to file a grievance pursuant to the provisions of article two, chapter six-c of this code.
(b) No agreement for compensation at a rate of less than the rate to which the employee is entitled under this article is a defense to any action under this article.
(c) The rights and procedures provided under this section are subject to the provisions of the rules promulgated by the Equal Pay Commission in accordance with section six of this article.
(d) Except as otherwise provided in subsection (d), section six of this article, the provisions of this section shall not become effective until the Legislature approves for promulgation the rules proposed by the Equal Pay Commission under the provisions of subsection (c) of said section.