The opinion
SUPPLEMENTAL OPINION ON DENIAL OF REHEARING
PRESIDING JUSTICE COCCIA delivered the opinion of the court:
On July 20, 1989, County of Cook, Cermak Health Services (Cook County), filed a petition for rehearing. We subsequently ordered briefing. General Service Employees Union, Local 73, SEIU, AFL-CIO, filed its answer in opposition to the petition on August 18, 1989; on August 21, 1989, the Local Labor Relations Board (board) filed its answer. Cook County’s reply to the answers was filed on September 1,1989.
In the petition for rehearing, Cook County reargues points raised in its supplemental response. As noted in our opinion of June 30, 1989, we granted Cook County leave to file the supplemental response after oral argument, when we raised sua sponte the issue of whether its appeal had been taken in a timely fashion. We addressed the points Cook County now reargues in that opinion and see no reason to revisit them here. Indeed, Hlinois Supreme Court Rule 367(b) forbids reargument in petitions for rehearing. See 113 Ill. 2d R. 367(b).
In addition, however, Cook County argues a new point in its petition for rehearing. Cook County now urges that its petition for review was timely filed when measured by the board’s own rules. Supreme Court Rule 367(b) likewise provides for rehearing on only those “points claimed to have been overlooked or misapprehended by the court” in its original opinion. (See 113 Ill. 2d R. 367(b); see also People v. Mallett (1970), 45 Ill. 2d 388, 397-98 , 259 N.E.2d 241, 246 .) Cook County failed to advance this contention in its supplemental response, although it had the opportunity to argue whatever points it wished regarding the jurisdictional question we raised. As Supreme Court Rule 367(b) does not permit either the argument of new points on rehearing, or reargument, Cook County’s petition for rehearing must be denied.
Petition denied.
MURRAY and PINCHAM * , JJ., concur.
Justice R. Eugene Pincham participated in this case prior to his resignation, which participation included concurrence in the majority opinion filed on June 30, 1989, and the order denying the petition for rehearing filed on November 13, 1989, and approval of the supplemental opinion filed herein.