Official membership of the planning council shall consist of those undersigned public jurisdictions and such other jurisdictions as may hereafter be elected to membership by the planning council. Immediately upon the execution of this agreement, each of the undersigned member jurisdictions of the planning council shall designate two official member-representatives to the planning council and an official alternate representative. One of the official member-representatives must be a member of the legislative body of the participating jurisdiction. (Added by § 4 of Agreement adopted Jan. 31, 1966).