Maxim 1.7.12
The law looks forward, not backward.
Lex prospicit, non respicit.
Source: Jenk. Cent. 284; Jackson 524; Weisman, 71pp
Difficulty 1/5 — Foundational
Explanation
Laws operate prospectively — they govern future conduct, not past acts. A new law cannot punish what was lawful when done.
Where this applies
- Someone is punished for something that was not illegal when they did it.
- A new regulation is applied retroactively to past conduct.
Legal domains
See also
Cite this maxim
NeCede Max. 1.7.12 — The law looks forward, not backward. — Jenk. Cent. 284; Jackson 524; Weisman, 71pp (Lex prospicit, non respicit.)
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