Additional protocol that modifies the convention between the government of the United States of America and the government of the United Mexican States for the avoidance of double taxation and the prevention of fiscal evasion with respect to taxes on income message from the President of the United States transmitting additional protocol that modifies the convention between the government of the United States of America and the government of the United Mexican States for the avoidance of double taxation and the prevention of fiscal evasion with respect to taxes on income signed at Washington on September 18, 1992. The additional protocol was signed at Mexico City on September 8, 1994.