Protocol amending tax convention with Canada : message from the President of the United States transmitting protocol amending the convention between the United States of America and Canada with respect to taxes on income and on capital signed at Washington on September 26, 1980, as amended by the protocols signed on June 14, 1983, March 28, 1984, and March 17, 1995, signed at Ottawa on July 29, 1997. (U.S. G.P.O., 1997)