Res inter alios acta vel iudicata, aliis nec nocet nec prodocet - What has been agreed/decided between people (a specific group) can neither benefit nor harm a third party (meaning: two or more people cannot agree amongst each other to establish an obligation for a third party who was not involved in the negotiation; furthermore, any benefit that may be established will have to be accepted by the third party before it can be implemented).⏎
Ultra posse nemo obligatur - "No one is obligated (to do) more than he can." Specifies that one should do what he can to support the community, but since everyone has different levels of ability, it cannot be expected that all will perform the same.⏎
Salus populi suprema lex esto - "The good of the people shall be the supreme law." Used variously as a motto, a reminder, or a notion of how the law and governments in general should be.⏎
Rex non potest peccare - "The king can do no wrong." Used to describe the basis for sovereign immunity.⏎