Section 25.05 - Miscellaneous Restrictions(1) Aircraft engine run-ups shall be conducted only with the express prior approval of the Executive Director and only in those areas of the airport specifically designated for such purpose by the Executive Director.(2) "Intersection takeoffs" by aircraft with a maximum certificated gross takeoff weight of 12,500 pounds or greater are prohibited.(3) Touch-and-go operations shall not be performed by aircraft with a maximum certificated gross takeoff weight of 12,500 pounds or greater.(4) Aircraft touch-and-go operations are prohibited between the hours of 11 P.M. and 7 A.M.(5) Auxiliary Power Units (APU's) and Ground Power Units (GPU's) shall not be utilized outside hangars by any aircraft between the hours of 11:00 P.M. to 7:00 A.M. unless part of takeoff procedures or as part of necessary maintenance procedures. Such run-ups shall only be conducted in areas designated by the Executive Director for this purpose. Between the hours of 7:00 A.M. to 11:00 P.M., the duration of such unit operation is limited to 30 minutes and shall be conducted only in those areas of the airport specifically designated for such purpose by the Executive Director.