Let`s look at a few that may appear in a service contract: you can choose whether the parties can change the rates. All changes require notification, and there is a minimum period during which prices cannot be changed and a cap on the extent to which they can be increased. The Parties may wish to provide for overtime and pro rata days, and attach these details to the tariff plan of this Agreement. A service contract is an ongoing relationship with continuous work until a party decides it`s time for it to end. This is a duty of care of the employer`s liability. When a worker acts outside the line, he is under contract of the employer and therefore of the company. This means that the employer is liable for any fault of the worker.