Employment contracts are very important to both parties involved. They are in many cases complex because of federal or state law requirements that must be incorporated. A legal employment contract may not waive rights granted by the state or federal government. Any such contract is invalid. However, for quality legal contracts, breaking the employment contract is grounds for immediate termination. There are complications in the unspecified laws that employers take advantage of. Though it is not illegal to leave one company for their competitor, doing so in violation of a non-compete agreement made in an employment contract is illegal.