What happens if you don't register for Selective Service?

Article Title: What happens if you don't register for Selective Service?

Article Snip: "...Penalties for Failing to Register If required to register with Selective Service, failure to register is a felony punishable by a fine of up to $250,000 and/or 5 years imprisonment. ...How failing to register for Selective Service creates a problem for men filing Form N-400, Application for Naturalization...Permanent resident men are commonly surprised when they stumble upon , Application for Naturalization."

Article Reference: citizenpath.com