The Shaw-Hayden parking lot shall be subject to the following specific rules and regulations regarding its operation:
(a) There shall be in this parking lot not more than 12 permit parking spaces and no parking meters.
(b) Free parking shall be permitted between the hours of 8:00 a.m. and 10:00 p.m. for a maximum of two hours.
(c) Free parking shall be permitted between the hours of 10:00 p.m. and 8:00 a.m. except in permit parking spaces.
(d) The enforcement period shall be 24 hours a day, seven days a week.