Each co-op not subject to rate case procedures, at least ninety (90) days before the effective date of any proposed rate change, shall notify the Arkansas Public Service Commission and each of its member-consumers of the proposed rate change. Notice to the commission shall include a verified statement showing the then total number of member-consumers of the co-op. Notice by the co-op to its member-consumers shall:
(1) Be in a form prescribed by the commission;
(2) Be by regular mail and may be included in regular member-consumer billings or in regularly published co-op newsletters provided to its member-consumers; and
(3) Include a schedule of the proposed rate change, the effective date of the proposed rate change, and the procedure necessary for the member-consumers to petition the commission to apply rate case procedures.