Would the view of Dr Kline get within say 1689 LBCF then?In short the answer is no David. There are other Reformers from the 17th Century that also held to varying views similar to Kline's view of the Mosaic Covenant, John Cameron or even Johannes Cocceius. Being a Reformer does not make one a Reformed Theologian. Ruben put it quite concisely that, "Cocceius idea of a gradual abrogation of the covenant of works doesn't make the cut as "Reformed" in that it wasn't included in any of the Reformed confessions." I do not believe that Kline held to a view of gradual abrogation of the Covenant of Works but his view of the Mosaic Covenant being both a Covenant of Works and a Covenant of Grace has some similarities.