Gentlemen - ages 17 & 18: You must register with Selective Service within 30 days of your 18th birthday. It is your legal and civic responsibility. In fact, it’s the law! Once a young man registers, he stays eligible for programs and benefits connected to registration such as college loans, government jobs, job training, and citizenship for immigrant men seeking to become a U.S. citizen. To register, go to any post office or see Mrs. Reed in A214.