[Freddy]

Your seasoned consideration of this is appreciated . . .
Rule 9-1-3d. says, "No player shall enter or leave a marked lane space." In view of the wording stated in 9-1-3g, the "vertical plane" seems always to have been an important consideration in whether a lane-space violation occurs. That is, break the plane by putting a foot in the air over the free throw lane and a violation has occurred under the proper circumstances.
But now the 2009-10 NFHS MAJOR EDITORIAL CHANGE on 9-1-3d makes this clarification: that "a player leaves a marked lane space when he or she contacts any part of the court outside the marked lane space (36 inches by 36 inches)." That seems to change the "vertical plane" stipulation to permit anything short of contact with the floor within the lane until, for instance, the ball strikes the rim.
Does this '09-10 9-1-3d editorial change invalidate 9-1-3g?