Some parents complain that their rights and their children's are compromised by vague and one-sided contracts which allow Heads to use discretionary powers unfairly, such as in expulsion on non-disciplinary grounds. They believe independent schools have not embraced the principles of natural justice as adopted by the state sector, and private law as applied to Higher Education. This belief is reinforced by the fact that the legal rights of pupils are governed by a private contract, as opposed to rights implemented by the national government. For instance, a pupil seeking admission to a state school that is rejected is legally entitled to appeal, whereas at an independent school admissions are at the discretion of the governing body of the school.