In 2003, 2.6% of the American military were non-citizens. There were over 37,000 non-citizen active duty members of the armed forces, out of a total of 1,414,000 on active duty. About 6,000 enroll each year. Until recently a non-citizen had to serve three years, have already permanent resident (green card) status, to become naturalized. That is today reduced to one year. Normal minimum wait time for green card holders for naturalization is five years. These rules for military members are laid out in section 328 of the Immigration and Nationality Act.