In Plymouth, the Board of Selectmen will meet Tuesday night in joint session with the School Committee and the Building Committee. The purpose of the meeting is to review the first phase of the Feasibility Study for the renovation and addition, or replacement of Plymouth South High School. The feasibility study has been authorized by the Massachusetts School Building Authority, or MSBA, with the requirement that it be presented to public leadership for review and approval three times as planning evolves. Two additional reports to the combined Committees are expected next year, in February and June. At each report, the MSBA requires local review and approval before proceeding to the next phase. An assessment of the physical condition of the existing South High School, and an analysis of the two options: one for a completely new high school building and one for a renovation and addition to the present building will be included in the report tonight. It is expected that the project would receive at least 50 percent state reimbursement of the approved project cost. Selectmen meet tonight at 7:00.