On Tue, Sep 4, 2012 at 1:51 AM, Marķa Leandro <tatica@fedoraproject.org> wrote:

Unless is noted, all content at openclipart has copyright 0, which allows you to copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission

As the website says: "Unless noted, content on this site is waived of all copyright and related or neighboring rights under theCC0 PD Dedication. "

you can read more here: http://openclipart.org/policies

Thanks for quick support.
Umesh Agarwal