In the event that contractors will work overtime or perform nightly of all kinds will notify a supervisor's.Letters not less than 24 hours, the supervisor will work.
In the event that the contractor will be working overtime. Or work all night To let the supervisor know in writing letters not less than 24 hours for supervisors to control the operation.
In the case of contractors, work overtime or night work of all kinds. Inform supervisor informed in writing.The letters not less than 24 hours. The supervisor will be controlled.