he contractor(s) will be required to have ample equipment and staff available simultaneously as required by PBA during the contract period. 4.2.2 The contractor(s) will furnish all labor, equipment, vehicles, and other items necessary to accomplish each assignment and/or project. All personnel are required to be employees of the contractor(s). No contract or day laborers are permitted. No subcontracting will be permitted under the contract without prior written permission from PBA. The use of any building tenant or PBA office equipment, space, items, and articles are strictly prohibited. 4.2.3 Contractors must provide at least one employee on every job assignment with the ability to speak, read, write, and understand English so PBA’s staff can communicate effectively with them. 4.2.4 Contractor(s) must take precautions necessary to protect persons or property against injury or damage. Contractor(s) will be solely responsible for any such damage or injury to property or persons that occur as a result of their fault or negligence. Any damaged item(s) must be replaced or repaired at PBA’s discretion at no additional cost to PBA. Any repairs/replacements shall match the existing in all cases and shall be completed to the satisfaction of PBA. All repairs must be completed in a timely manner. Contractor(s) will have thirty days from the date of such damage to complete repairs/replacements. However, if the damage is such that it cannot be repaired/replaced within thirty days, it shall not constitute a breach if corrective action is instituted by contractor(s) within such period and is diligently pursued until the property is substantially returned to the condition which existed immediately prior to the damage. Should repairs not be made in a timely manner, PBA reserves the right to cause such repairs to be completed by an alternate source and charge the entire cost, plus a 20% administrative fee of such repairs to contractor(s). 4.2.5 Contractor(s) must perform work without unnecessarily interfering with the activities of tenants or other contractor(s). Contractor(s) must not disable or disrupt building fire or life safety systems without prior written notice to and written approval from PBA. 4.2.6 The contractor(s) must be able to complete all tasks normally encountered in commercial buildings within the time specified by PBA