This interim report about the court's order for voluntary, interdistrict desegregation in the St. Louis, Missouri public schools was filed by the Desegregation Monitoring and Advisory Committee. The report discusses the problems of defining the relationship between "voluntary" and "mandatory," and developing alternative solutions to desegreqation. The issue of whether a voluntary plan can protect participating districts against further litigation is examined with respect to the following questions: (1) Is there a legal barrier to a resolution of potential school desegregation claims against a county school district by means short of full litigation of a district's liability? (2) To what extent can such a resolution eliminate a county school district's exposure to future school desegregation litigation? and (3) What criteria must such a resolution meet? The characteristics of a possible voluntary, cooperative interdistrict plan are discussed in response to these questions. (Author/JCD)