French administrative law focuses on proper functioning of government and the public good, rather than constraining the government. French public bodies include governments and public organizations or enterprises, subject to different sets of rules, with both privileges and additional limitations compared to private actors. Public bodies have tremendous powers, including police powers ("pouvoirs de police") to regulate public health or public order, and to expropriate property. Public bodies must exercise their powers in the public interest, according to principles such as continuity of services (which has been used to limit the power to strike), adaptability (changing in accordance with external circumstances), equality and neutrality (in relation to, e.g. one's religion or political beliefs).