Lex non scripta is aLatin expression that means "law not written" or "unwritten law". It is a term that embraces all the laws which do not come under the definition of written law orlex scripta^[1] (i.e. statutory law, created by a governing body^[2]). It is composed, principally, of thelaw of nature, thelaw of nations, thecommon law,^[3] andcustomary law.

• List of Latin phrases
• Unspoken rule