1) Decriminalisation 
Decriminalization or decriminalisation is the abolition of criminal penalties in relation to certain acts, perhaps retroactively, though perhaps regulated permits or fines might still apply (for contrast, see: legalization). The reverse process is criminalization. Decriminalization reflects changing social and moral views. A society may come to th...
n. Crimes which are no more subject to prosecution because the statues that made the act criminal were repealed or amended. Certain sexual practices between consenting adults, loitering, or outmoded racist laws against miscegenation have been decriminalized by many states. There is substantial movement towards decriminalizing the use of certain nar...
The repeal or amendment of statutes which made certain acts criminal, so that those acts no longer are crimes or subject to prosecution.
[n] - legislation that makes something legal that was formerly illegal
decriminalisation noun legislation that makes something legal that was formerly illegal
the elimination of criminal penalties for the possession or use of something.