I don't think that's necessary, though. As the original creator, you're the "owner", not a licensee. As the owner you reserve the right to re-license it to an

I don't think that's necessary, though. As the original creator, you're the "owner", not a licensee. As the owner you reserve the right to re-license it to anybody you'd like, under any license you'd like, as long as you don't give that right away. At a job, or on a contract, the employment agreement or the contract will almost always says you're giving that right to them in exchange for compensation.