More NCAA-M Questions

[SC Official]

-Every offensive frontcourt throw-in is from either 28-foot line or from 3 feet outside either side of the lane except when the defense deflects the ball out of bounds. Correct?

What if Team A has control in Team B's backcourt, steps out of bounds, and Team B is to put the ball in play in its frontcourt? Is the throw-in from the OOB spot or one of the four designated spots?

-(not a question about a new rule) B1 defending thrower-in A1 violates the boundary plane. This is not one of the warning situations in Rule 4-10. Rule 9-4.3 says “The opponents of the thrower-in shall not have any part of their person beyond the vertical inside plane of any boundary line before the ball has crossed that boundary line. Repeated infractions shall result in a CLASS B technical foul.”

Does "repeated infractions" refer to any team member, or just B1? Is it incorrect to record a warning for this in the book?