Variations exist on how the agreements are drawn up. Normally, a General Agreement outlining the policies of the Program is supplemented by a subsidiary agreement on mapping, with further sub-agreements possible on flood forecasting, structural controls and studies. The General Agreement sets out the basic approach for reducing flood damages and the policies agreed upon by the two governments. The basic approach is that where flood damage reduction measures are proposed, all practicable structural and non-structural alternatives are considered, including the option of letting some flood damage occur. Effectiveness, cost, associated benefits and environmental impact are to be accounted for in the selection of alternatives.
Preference is to be given to measures that prevent flood vulnerable development.
The Mapping Agreement provides for a mapping program to delineate and designate flood risk areas in which the FDRP policies are applied and to inform the public of the Program. Forming part of the agreement is the list of places to be mapped. Detailed hydrologic and cartographic specifications are also included because of the important economic, social, and legal implications of the Program. Since mapping by itself is not beneficial unless used, the public information component of the Program is the key to its effectiveness. Public information sessions are held in the effected communities throughout the mapping process.