The tee markers defining the front limit of the teeing area are set at the ‘stones’ at the very back of the teeing ground/box.
1) Must they be set such that the player is provided with a 2 club length rectangle of prepared surface and that area must be within the evident or defined bounds of the teeing ground/box (I think the answer is No, but asking for confirmation)
2) If the answer to 1) is No, then can the player tee his ball up off the prepared area or indeed off the defined or evident teeing ground/box as long as it is teed up in a rectangle formed two club lengths back from the tee markers? I assume the player is allowed to take his stance outside of the prepared area or indeed off the defined or evident teeing ground/box as long as his ball is teed up within the rules.