The Pan American Health Organization is the world’s oldest international public health agency. It provides technical cooperation and mobilizes partnerships to improve health and quality of life in the countries of the Americas. PAHO is the specialized health agency of the Inter-American System and serves as the Regional Office for the Americas of the World Health Organization (WHO). Together with WHO, PAHO is a member of the United Nations system. Here are the Basic Documents of the Pan American Health Organization which include: the Pan American Sanitary Code; the constitutions of the Pan American Health Organization and of the World Health Organization; the Rules of Procedure of the Pan American Sanitary Conference, the Directing Council, and the Executive Committee; and the Financial Regulations of the Pan American Health Organization.