For examples of this type of ECA, click on the following links: Edison Electric Institute Master Power Purchase & Sale Agreement (PDF) (4/25/2000) and Tri-State ADI. Power Purchase Agreement (AAE) for medium to large oil plants (Example 5) – A typical power purchase agreement for oil plants in developing countries. Created by an international law firm for the World Bank for an overview of the provisions usually found in electricity capture contracts in international private power plants. Examples of this type of AA are listed below. Survey AAs have been divided into those that are more relevant for smaller, rural energy projects and more complex AOPs, which are relevant for larger projects in developing countries.