In Pennsylvania, agreements can be established, in trade for certain raises, bonuses, or even promotions. The other side of the agreement is that the employee cannot work with a competitor once the employment ends. There is a small loophole that exists in non-competition clauses, but has now been rectified. Once employment has commenced, the agreement would now be void at any point, even if the employee is threatened with loss of job. In simple terms, this agreement would be valid if signed upon before employment begins. Should this agreement be proposed after employment has begun, despite even the employee being threatened with his or her job, the document is invalid.