The Legislature shall annually appropriate such sums as may be necessary to pay the proportionate share of the administrative costs for the state as an employer, and each division, agency, board, commission or department of the state which operates out of special revenue funds or federal funds or both shall pay its proportionate share of the administrative costs of the insurance plan or plans authorized under the provisions of this article. All other employers not operating from the state General Revenue Fund shall pay their proportionate share of the administrative costs of the insurance plan or plans authorized under the provisions of this article.