Legal Maxim's

Omne sacramentum debet esse de certa scientia
— Every oath ought to be of certain knowledge.
Omnia delicta in aperto leviora sunt
— All crimes (committed) in the open are (considered) lighter.
Omnia praesumuntur contra spoliatorem
— All things are presumed against a wrongdoer.
Omnis innovatio plus novitate perturbat quam utilitate prodeat
— Every innovation disturbs more by its novelty than it benefits by its utility.
Optima legum interpres est consuetudo
— The best interpreter of laws is custom.
Optimus interpres rerum est usus
— The best interpreter of things is usage.