Can I remove copyright in the footer?


I just installed latest version of phpbb, I would like to know if I can remove the copyright message from the footer which says powered by. Can I remove that is that allowed or its ilegall to do that?
I search in forum and google, I saw many posts where it says its okay to remove but I will be more satisfied if I get the answer here :)

Maybe the answer is here already in forum but its huge forum hard to search? Thank you.

Example Kitchen Equipment Video