 Like resident aliens, they are not presently allowed by any U.S. state to vote in federal or state elections, although, as with resident aliens, there is no constitutional prohibition against their doing so.A laissez-passer (French for "let pass") is a travel document issued by a national government or certain international organizations, such as the United Nations, European Union and the International Committee of the Red Cross (ICRC).A laissez-passer is often for one-way travel to the issuing country for humanitarian reasons only such as Restoring Family Links.