No person shall be selected or continue to serve as a member or alternate member of the Committee who is not actively engaged in the business of the group which he represents either in his own behalf, or as an officer, agent, or employee of a business unit engaged in such business: Provided, That only producers, as defined in § 989.11, engaged as such with respect to the most recent grape crop, are eligible to serve on the Committee. Only handlers who packed or processed raisins during the then current crop year shall be eligible to represent handlers on the Committee. Any handler eligible to represent a particular group shall continue to represent handlers for the entire term for which he was selected.