- Laissez-faire – Political theory where a government does nothing to control the market. The policy of leaving things to take their own course, without interfering.
- Leges posteriores priores contrarias abrogant – Subsequent laws repeal prior conflicting ones.
- Legibus sumptis desinentibus legibus naturae utendum est – When laws imposed by the State fail, we must use the laws of nature.
- Lex aliquando sequitur aequitatem – The law sometimes follows equity.
- Lex citius tolerare vult privatum damnum quam publicum malum – The law would rather tolerate a private injury than a public evil.
- Lex dabit remedium – The law will give a remedy.
- Lex dilationes abhorret – The law abhors delays.
- Lex est judicum tutissimus ductor – The law is the safest guide for judges.
- Lex fori – Law of the place where the cases been heard.
- Lex loci actus – Law of the place where the act took place.
- Lex Mercatoria – The law merchant. It is a body of legal principles founded on the customs of merchants in their dealings with each other, and though at first distinct from the common law, afterwards became incorporated into it.
- Lex necessitatis est lex temporis i.e. instantis – The law of necessity is the law of time, that is time present.
- Lex nil frustra facit – The law does nothing in vain.
- Lex non a rege est violanda – The law must not be violated even by the King.
- Lex non deficere potest in justitia exhibenda – The law cannot fail in dispensing justice.
- Lex non favet delicatorum votis – The law does not favor the wishes of the dainty.
- Lex non novit patrem, nec matrem; solam veritatem – The law does not know neither father nor mother, only the truth.
- Lex non oritur ex injuria – The law does not arise from a mere injury.
- Lex non requirit verificari quod apparet curiae – The law does not require that to be proved which is apparent to the Court.
- Lex prospicit not respicit – The law looks forwared, not backward.
- Lex punit mendaciam – The law punishes falsehood.
- Lex rejicit superflua, pugnatia, incongrua – The law rejects superfluous, contradictory and incongruous things.
- Lex spectat naturae ordinem – The law regards the order of nature.
- Lex succurrit ignoranti – The law succors the ignorant.
- Lex tutissima cassis, sub clypeo legis nemo decipitur – Law is the safest helmet; under the shield of the law no one is deceived.
- Lex uno ore omnes alloquitur – The law speaks to all through one mouth.
- Locus Standi – The right or capacity to bring an action or to appear in a court.
- Longa possessio est pacis jus – Long possession is the law of peace.
