No sum payable under this act to a veteran or to any other person under this act shall be subject to attachment, levy or seizure under any legal or equitable process and shall be exempt from all State taxation. No right to compensation under this act shall be assignable, except as otherwise provided in this act, or shall serve as a security for any loan. Any assignment or loan made in violation of this section shall be void. Assignments to any incorporated or unincorporated organization of veterans, any nonprofit corporation formed solely for the purpose of aiding disabled or incapacitated veterans and the State Veterans' Commission shall be valid.