S.J.RES.31: A joint resolution proposing an amendment to the Constitution of the United States relating to United States citizenship.

Constitutional Amendment - States that a person born in the United States shall not be a U.S. citizen unless: (1) one parent of the person is a U.S. citizen; (2) one parent of the person is an alien lawfully admitted for permanent residence in the United States who resides in the United States; (3) one parent of the person is an alien performing active service in the U.S. Armed Forces; or (4) the person is naturalized in accordance with the laws of the United States.