1947 House Bill 1715. An Act Enlarging Upon The Powers And Duties Of The Port Of Boston Authority And Providing For The Construction, Maintenance, Repair And Operation Of A Bridge Over The Boston Inner Harbor, And For The Construction, Maintenance, Repair And Operation Of A Bridge Over Charles River, And An Elevated Motor Highway And Parking Facilities And Conferring Further Powers And Imposing Additional Duties On Said Authority And Authorizing The Issuance Of Revenue Bonds Of Said Authority, To Pay The Costs Of Such Project.