The provisions of this subchapter shall not apply to those health care plans which are maintained:
(1) Pursuant to a collective bargaining agreement;
(2) By a tax exempt rural electric cooperative;
(3) By The Poultry Federation; or
(4) By any nonprofit vision service plan corporation composed of at least fifty (50) participating optometrists or ophthalmologists licensed by the State of Arkansas to provide vision care services on a prepaid basis when each licensed optometrist or ophthalmologist is subject to the rules of the professional's respective state board and when each participating licensed optometrist or ophthalmologist agrees to assume responsibility for completion of the provisions of the vision care services contracted for so that no element of risk is incurred by any subscriber group or person.