North Dakota Civics Practice Test – Prep, Practice Exam & Study Guide

Men must register for the Selective Service at the age of 18. This requirement is established by federal law in the United States. The registration serves as a means for the government to maintain a list of individuals eligible for military service, should a draft be necessary.

It's important to note that while individuals can pre-register before turning 18, the official requirement begins at age 18. This age aligns with the typical age of maturity defined by the government, as those reaching this age are generally expected to be legally responsible for their actions and aware of civic duties, such as registering for the draft.