The SFA have proposals on the table to adopt a pyramid system that would enable clubs to enter the Scottish League proper in the same way that the english league operates. The top ten clubs in the Highland League would become division 4 North and the same sort of thing would happen in the south of Scotland. There would be a play off between the champions of the North and South leagues for an automatic promotion, the losers of the play-off getting another play-off with the second bottom team of Div 3 for a place in that division. A bit complicated but I think that that's about the gist of the matter. Here is more on the proposal with analysis and comment over on Highlandleague.net.