Was Adam under the "moral" (10 commandments) law as WCF X1X:1,2 states even though this law was not given to any until Horeb (see Deuteronmy 5 "...The Lord made not this covenant with our fathers,but with us,even us ,who are all of us here alive this day) ?

What does "and,as such" mean in WCF X1X:2 ?