de minimis

Etymology
From, + , ablative of ; shortened form of the legal maxim.

Adjective

 * 1) Concerning things that are so minor as to be negligible, trivial or trifling. Often used to describe exemptions in government rules and regulations.
 * The tax is not payable on amounts below the de minimis limit of £100 per year.
 * The de minimis rules on import duty mean that alcohol for personal consumption is exempt from any charge.
 * 1)  Beneath the notice of the law; so minor as not to warrant a penalty or remedy.
 * The behaviour of the accused was technically assault, but the judge found it de minimis and entered an acquittal.