zlacker

I think this part about branching universes only applies to common law system (i.e. anglosaxon) ?

In law systems derived from roman law (like in my country) law doesn't depend on judges decisions.

But IANAL.

>>ajuc+(OP)
It happens on civil law systems as well. There are many courts whose only purpose is to check the compliance of new acts with more important acts. For example an ordinary act can be approved and later partially repelled by a revision court if found in contrast with the local constitution or basic law.

You also need multiple contemporary universes whenever a law system has _favor rei_, i.e. the most favourable interpretation or version of the law is used while judging.