Describe the impact of Selective Service System.
Selective Service is an independent agency of the United States government that maintains information on those potentially subject to military conscription. It is a contingency mechanism for the possibility that conscription becomes necessary. Registration with Selective Service is required for various federal programs and benefits, including the Free Application for Federal Student Aid, student loans and Pell Grants, job training, federal employment, and naturalization. It requires all male U.S. citizens and male immigrant non-citizens who are between the ages of 18 and 25 by law to have registered within 30 days of their 18th birthdays, and must notify the Selective Service within ten days of any changes to any of the information they provided on their registration cards, such as a change of address.