The first owner of copyright in general is author (exceptions: works for hire,[3] Government works; s. 17). The owner of copyright may assign the copyright (s. 18) or grant any interest in the copyright by license (s. 48). Licenses may also be granted by the Copyright Board (ss. 50–54). Registration of copyright with the Copyright Office is not obligatory, but if registration has taken place the Register of Copyrights gives prima facie evidence of the particulars entered therein (s. 60).