(a) The Illinois Department shall, within the time frames mandated by federal law, implement a Drug Utilization Review Program (DUR), designed to decrease overutilization of drugs through both prospective and retrospective utilization review. The Illinois Department shall determine the content of the DUR by rule.
     (b) The Illinois Department may implement this Section as added by this amendatory Act of 1991 through the use of emergency rules in accordance with the provisions of Section 5.02 of the Illinois Administrative Procedure Act. For purposes of the Illinois Administrative Procedure Act, the adoption of rules to implement this Section as added by this amendatory Act of 1991 shall be deemed an emergency and necessary for the public interest, safety and welfare.