The secretary of the Department of Health and Human Resources shall promulgate rules to carry out the provisions of this article. The Governor shall establish an advisory committee consisting of at least five individuals representing: An administrator of a small rural hospital; an administrator of a hospital having a disproportionate share of Medicaid or charity care; a registered professional nurse; a physician licensed in this state; and beneficiaries of the plan or plans. The majority of this advisory committee shall consist of health care providers. The purpose of the advisory committee is to advise and assist in the establishment of reasonable payment methods, schedule or schedules and rates. The advisory committee shall serve without compensation; however, the members thereof are entitled to reimbursement of their expenses. The policies and procedures of the rate schedule process setting forth the methodology for determination of rates, payments and schedules are subject to the legislative rule-making procedures of chapter twenty-nine-a of this code: Provided, That emergency rules may be utilized: Provided, however, That the actual rates, payments and schedules themselves shall not be subject to chapter twenty-nine-a of this code.