1977 Senate Bill 1663. Sixth Interim Report Of The Joint Special Committee Established (Under House Order, No. 5093 Of 1972 And Most Recently Revived And Continued By House Order, No. 5011 Of 1976) For The Purpose Of Studying (1) A New Division Of The Commonwealth Into Representative Districts And (2) A New Division Of The Commonwealth Into Forty Senatorial And Eight Executive Councillors Districts, Under The Provisions Of Article XCII Of The Amendments To The Constitution And In Conformity With The Decisions Of The Federal And State Courts, April 20, 1977.