The requirements of sections 198.401 to 198.433 shall apply only as long as the revenues generated under section 198.401 are eligible for federal financial participation as provided in sections 198.401 to 198.433 and payments are made pursuant to the provisions of section 198.401. For the purpose of this section, “federal financial participation” is the federal government’s share of Missouri’s expenditures under the Medicaid program. Notwithstanding anything in this section to the contrary, in the event federal financial participation is either denied, discontinued, reduced in excess of five percent per year or no longer available for the revenues generated under section 198.401, the director of the department of social services shall cause disbursement of all funds held in the nursing facility reimbursement allowance fund to be made to all nursing facilities in accordance with regulations promulgated by the department of social services, along with a full accounting of such disbursements, within forty-five days of receipt of notice thereof by the department of social services.