Final answer:
All males in the United States must register for the Selective Service System at the age of 18, maintaining their registration information until they turn 25. This registration is important for eligibility for federal programs and there are discussions about extending this requirement to females.
Step-by-step explanation:
Selective Service Registration Requirement
In the United States, all males are legally required to register for the Selective Service System when they turn 18 years old. This registration is a prerequisite for various federal programs and benefits, including student loans and government jobs. The Selective Service Act, which sets forth this requirement, ensures that the U.S. government can quickly mobilize armed forces in case of a national emergency. While the system has been historically associated with the draft during times of war, there is no compulsory military service outside of a declared draft situation. Currently, registration is strictly for the purpose of having a database of potential military personnel. Notably, there is a discussion about whether this requirement might soon extend to females, following a defense bill provision approved in April 2016.
The registration process can be done online on the Selective Service System's website or through certain forms available at U.S. Post Offices. Men must register within thirty days of their 18th birthday and are required to notify the Selective Service of any changes to their information until they reach the age of 25. Failure to register may result in penalties, including ineligibility for certain government services.