SFT has been abandoned because of lack of uptake so you won't find bfta rules on it.
But from memory. Same as ft except scopes limited to 12x, the scope can be parallaxed once only per lane and this has to be done before looking through the scope. If shooting prone it has to be done unsupported, ie not resting gun on ground, gun directly on hand on ground or using a lane post/peg. So prone balanced on elbows.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep