Consuetudo pro lege servatur - "Custom is held as law". Where no laws apply to a given situation, the customs of the place and time will have the force of law.⏎
Cuius est solum eius est usque ad coelum et ad inferos - Used in reference to the rights of property owners to the air above, and land below, their property.⏎
Dubia in meliorem partem interpretari debent - "Doubtful things should be interpreted in the best way". Often spoken as "to give the benefit of the doubt".⏎
De minimis non curat lex - "The law does not concern itself with the smallest things". There must be a minimal level of substance or impact in order to bring a legal action.⏎