International Joint Venture Act of 1981 - Declares that certain provisions of the Clayton Act and the Federal Trade Commission Act do not prohibit an individual or organization of the United States from participating in a joint venture which: (1) is composed of only such U.S. person and one or more foreign persons; (2) does not engage in any line of commerce in the United States in which such foreign person is already engaged; (3) is terminable by either party no later than ten years after it is formed; (4) provides for the exchange of technology; and (5) provides access to raw materials or to distribution marketing, or manufacturing facilities.