It is the intent of the Legislature that no provisions of this act shall prevent a producer co-operative association or producer co-operative corporation approved by the director, which sells the milk of or for its members or of persons who are now or hereafter under contract with such producer co-operative association or producer co-operative corporation, from blending the proceeds of all its or their net sales either within or without the State, and so paying its members or contractees; provided, however, no producer co-operative association or producer co-operative corporation shall be exempt from any other orders, rules or regulations promulgated by the director.
N.J.S. § 4:12A-31