Equipment and Systems Maintenance and Repairs 5.1.1 The contractor shall perform Corrective Maintenance as needed to restore the HVAC Systems to working order. The contractor shall bill for Corrective Maintenance on an hourly basis. Parts for Corrective Maintenance may be billed using the multiplier bid as described below. 5.1.2 The contractor shall respond to corrective maintenance requirements by telephone or in person within two (2) hours and must arrive onsite as soon as possible, but no later than twenty-four (24) hours after the contractor is notified by the agency. No exceptions to the twenty-four (24) hour requirement unless granted by the agency. 5.1.3 Corrective Maintenance must be performed between the hours of 8:00 a.m. Eastern standard time (EST.) and 4:00 p.m. EST., Monday through Friday, excluding Holidays, unless the agency approves work at another time. 5.1.4 Agency may request Corrective Maintenance on an emergency basis by notifying the contractor of the emergency. The contractor must respond to all emergency callouts. 5.1.5 If the location has a building automation system (BAS) that controls the facility equipment, it is also part of this contract.