a. U.S. Government employee
               For purposes of applying this provision of the agreement, the phrase "U.S. Government
                  employee" means employees of the Federal Government or any of its instrumentalities.
               
               b. Luxembourg Government employee
               For purposes of applying this provision of the agreement, the phrase "Luxembourg Government
                  employee" means employees of the Government of Luxembourg, the Executive Directors
                  of the Luxembourg Trade and Investment Offices and their staff, and anyone working
                  for the Luxembourg National Tourist Office in the United States.