On and after July 1, 2007, a retired justice of the supreme court, retired judge of the court of appeals or retired judge of the district court who retired pursuant to the retirement system for judges as provided pursuant to the provisions of Kan. Stat. Ann. § 20-2601 et seq., and amendments thereto, may enter into a written agreement as provided in this section to perform services for the commission on judicial performance while receiving service retirement benefits pursuant to the provisions of the retirement system for judges. Such retired justice or judge shall enter into a written agreement with the judicial council, established pursuant to the provisions of Kan. Stat. Ann. § 20-2201, and amendments thereto, to perform duties assigned by the judicial council to assist the commission in the judicial performance evaluation process prescribed pursuant to the provisions of Kan. Stat. Ann. § 20-3201 et seq., and amendments thereto. Such retired justice or judge shall be available to perform assigned duties for not more than 104 days or 40% of each year. Notwithstanding the provisions of law in effect on the retirement date of a retired justice or judge, such justice or judge shall receive a stipend, payable monthly, equal to 25% of the monthly salary of such retired justice or judge at the time of retirement of such retired justice or judge. Such agreement shall be for a period of not more than two years. A retired justice or judge may enter into subsequent agreements. The judicial council is hereby authorized and may pay on behalf of such retired justice or judge the amount specified by the Kansas state employees health care commission under the provisions of Kan. Stat. Ann. § 75-6508, and amendments thereto, as if the retired justice or judge is serving as a full-time employee of the judicial council and participating in the state health care benefits program to provide for such participation of the retired justice or judge. Any retired justice or judge entering into a written agreement with the judicial council to be available to perform assigned duties pursuant to this section for less than 104 days or 40% of each year for a proportionally reduced stipend shall be considered as if the retired justice or judge is serving under a part-time appointment as an employee of the judicial council and participating in the state health care benefits program to provide for such participation of the retired justice or judge, and the judicial council may pay on behalf of the retired justice or judge the amount specified by the Kansas state employees health care commission under the provisions of Kan. Stat. Ann. § 75-6508, and amendments thereto. The monthly stipend provided by this act shall not be counted toward the annual limitation on compensation provided in Kan. Stat. Ann. § 20-2616, and amendments thereto. A retired justice or judge who has fulfilled the requirements of an agreement entered into pursuant to this section may accept judicial assignments and be compensated in accordance with the provisions of Kan. Stat. Ann. §§ 20-310b, 20-2616 and 20-2622, and amendments thereto. If an assignment given to a retired justice or judge pursuant to the provisions of this section will require the retired justice or judge to exceed the service limit provided in this section, the retired justice or judge shall be compensated in accordance with the provisions of Kan. Stat. Ann. § 20-2616, and amendments thereto.