This voluntary plan for the interdistrict exchange of students responds to a desegregation court order issued to the St. Louis, Missouri Board of Education. Among the criteria cited as necessary to the operation of permissive interdistrict transfers were: (1) eligibility of a student to transfer to a district and school where the student's race is in the minority; (2) determination of space availability by the host district; (3) agreement by the host district to provide the same educational services to the transfer student as are provided its own students; (4) agreement by participating districts to provide information on space availability by school and by grade; (5) the right of eligible students to apply for a specific school in which space has been identified; and (6) agreement by participating districts to actively promote interdistrict transfer. Criteria for student selection, evaluation of building capacity and site selection for magnet schools and other special programs, staff exchanges, parent/community involvement, transportation policies, and administrative coordination are also examined. A discussion of finances includes an itemized budget summary for the plan. The budget also describes activities for the implementation of the plan over a three year period, and includes the estimated number of students involved during each phase. (JCD)