Treaty traders and investors who have changed status in the United States with USCIS must follow the steps for first-time investors. Such a change of status remains valid only while the applicant remains in the United States. Once the applicant has left the United States, he or she requires an E-visa to return and resume the running of his or her business. Change of status does not guarantee the issuance of a visa nor does it exempt the investor from the normal process of filing documents in advance with the Embassy in London.