American men 18 years or older have to register with the selective service so they can qualify for financial aid programs in state colleges. the local court system can call on them to sit for jury duty. the federal government can contact them in case of a draft. they can vote.

Yes. According to Selective Service's official site, "Almost all male U.S. citizens regardless of where they live, and documented or undocumented immigrant men residing in the U.S., are required to be registered with Selective Service if they are at least 18 years old".

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