before the President assigns or details members of the United States Armed Forces to the Multinational Force and Observers, he shall notify the Congress of the names of the other countries that have agreed to provide military personnel for the Multinational Force and Observers, the number of military personnel to be provided by each country, and the functions to be performed by such personnel; and

if a country withdraws from the Multinational Force and Observers with the result that the military personnel of less than four foreign countries remain, every possible effort must be made by the United States to find promptly a country to replace that country.