<P> In addition, residents of the Northern Mariana Islands who automatically gained U.S. citizenship in 1986 as a result of the Covenant between the Northern Marianas and the U.S. could elect to become non-citizen nationals within 6 months of the implementation of the Covenant or within 6 months of turning 18 . </P> <P> The U.S. passport issued to non-citizen nationals contains the endorsement code 9 which states: "THE BEARER IS A UNITED STATES NATIONAL AND NOT A UNITED STATES CITIZEN ." on the annotations page . </P> <P> Non-citizen U.S. nationals may reside and work in the United States without restrictions, and may apply for citizenship under similar rules as foreign nationals or citizens, except that they do not need to hold U.S. permanent resident status when they apply or to have held it for any length of time before applying . Like permanent residents, they are not currently allowed by any U.S. state to vote in federal or state elections, although, as with permanent residents, there is no constitutional prohibition against their doing so . </P> <P> Like U.S. citizens, non-citizen U.S. nationals may transmit their non-citizen U.S. nationality to children born abroad, although the rules are somewhat different than for U.S. citizens . </P>

Can a us national became a us citizen