Law and Gospel again

In WCF 8.6, we read that the “virtue, efficacy, and benefits” of the work of redemption were “communicated unto the elect” even before the actual accomplishment of redemption in the incarnation, death, and resurrection of Jesus. “From the beginning of the world” these benefits were given ” in and by those promises, types, and sacrifices wherein He was revealed.” Gospel benefits, in short, are communicated to those under the law.

So how, exactly, is Torah a republication of the covenant of works?