If at any time there is an insufficient amount of money in the fund to pay each person entitled to the benefits, each beneficiary shall receive payment on a pro rata basis.

(Acts 1947, No. 13, p. 7, § 24; Acts 1967, No. 602, p. 1390, § 4; Acts 1975, No. 438, p. 1049, § 3; Acts 1978, No. 629, p. 891, § 1; Act 80–300, § 3.)