Writing credits for films and TV shows written under the jurisdiction of the Writers Guild of America (WGA) use the WGA screenwriting credit system. For writers who belong to the WGA, the writing credits affect reputation, union membership, and income. Under the rules, the film producer must first submit the proposed writing credits for the project to both the WGA and all the participating writers. If any participating writer objects to the proposed credits, it then enters arbitration, with the WGA being the final arbiter.