[ref18]

1. B-1 Reaches through the plane of the boundary line and fouls thrower-in A-1. Official charges B-1 with an intentional personal foul and issues a warning to team B. Is the official correct?

I say no, because I don't think you need to give a warning along with the Intentional.

2. While A-1's try is in flight, A-2 fouls B-2. The try is successful. Team B is not in the bonus. Official rules team B's throw-in is a designated spot throw-in. Is the official correct?

I can't remember whether B can run the endline or take the spot.

3. A-1's try hits the ring and bounces straight up in the imaginary cylinder above the ringt livel, when B-1 touches the basket. Official rules this basket interference. Is the official correct?

BI can only happen if the ring is touched when the ball is on the ring.

4. B-1, while playing the ball causes excessive contact. Official rules this an intentional personal foul. IS the official correct?

Excessive contact does not constitute an intentional foul.

5. A double personal foul is charged while team A is in countrol. Official awards the ball to team A nearest the spot of the foul. Is the official correct?

POI is wherever A had the ball, not where the foul occured.