Which countries allow reverse engineering for one of their licences when it permits unlimited software copying, & doesn't forbid reverse engineering?

I was under the impression that reverse engineering can mainly be legally prohibited in two ways: via copyright law forbidding the making of copies; and via an end-user licence agreement (EULA) specifically prohibiting reverse engineering.

I’ve come across a software licence that permits unlimited software copying (under certain conditions) & doesn’t explicitly prohibit reverse engineering. I’m based in the UK, and thought that if UK law governed the agreement, that I would then be able to reverse engineer the software (under the certain conditions).

It just so happens that Californian law governs the licence so I’m slightly unsure as to whether I can legally reverse engineer the software.

Anyone have any answers on the overall question of this post?