The answer depends upon whether the employer requests a change of status or consular notification. Your L-1B nonimmigrant status would terminate immediately upon the approval of your H-1B nonimmigrant status of the change of status effective date. You cannot be in both L-1B and H-1B status. If the employer selected consular notification, you would not be in H-1B status until you re-entered the United States on a valid H-1B visa. You can read more about work visas at http://myattorneyusa.com/work-visas.
Answered on Feb 24th, 2016 at 4:08 PM