evidence: All male U.S. citizens and immigrant non-citizens who are between the ages of 18 and 25 are required by law to have registered within 30 days of their 18th birthdays,[3][4][5] 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.[6] The Selective Service System is a contingency mechanism for the possibility that conscription becomes necessary. [...] 1980 to present [edit]On July 2, 1980, President Jimmy Carter, signed Proclamation 4771 (Registration Under the Military Selective Service Act) in response to the Soviet invasion of Afghanistan in the previous year of 1979,[33] retroactively re-establishing the Selective Service registration requirement for all 18- to 26-year-old male citizens born on or after January 1, 1960.[34] As a result, only men born between March 29, 1957, and December 31, 1959, were completely exempt from Selective Service registration.[35]