CPL and Subclasses

Question

Two questions really, I'm fairly confident about the first but not sure on the second.

Firstly: If I write a subclass of a class from a library released under the CPL, do I also need to release this subclass under the CPL?

Secondly: If I copypaste some code from a CPL library, then make reasonably substantial modifications to the code, and then include this code in a commercial project, does the modified code need to be released under the CPL?

Answer 1

This depends on where you are publishing from. From Denmark you only need to make some quite substantial changes to the code to ignore the copyright. But you can't release anything from a more open license to a less open license.