The real answer: It depends. The law itself only says that you can't make any copies except for some gray areas called "fair use". Beyond that, it depends upon what the copyright holder licenses you to do.
At least, that's my layman's interpretation. IANAL, YMMV, &c.
Edit: In the US.
At least, that's my layman's interpretation. IANAL, YMMV, &c.
Edit: In the US.