“3 Points” Concept While Straddling the DL.

[LRZ]

Rules 4-4-1 and 4-4-6 seem pretty clear. And CB 4.4.1 is analogous to your case:

As Team A is advancing the ball from its backcourt toward its frontcourt, A1 passes the ball to A2. A2 catches the ball while both feet are on the floor with one foot on either side of the division line.... (a) ... (b) A2 lifts the foot which is in the frontcourt, pivots and puts it on the floor in the backcourt. RULING: ... In (b), when A2 lifts the foot which is in the frontcourt and places it down in the backcourt, the location of the ball has not changed. The ball is still in the backcourt and no violation has occurred....

"Advancing the ball" is not essential to Rule 4-4 and its provisions. Your interpreter is using the rules to create problems, not solve them. A rhetorical question: What do you do when your interpreter is clearly wrong?