Team Control Established on Throw In (NFHS)

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When is team control established on a throw in? There is no team control on the throw in (NFHS Rule 4-12-6) and the throw in ends when it is legally touched (NFHS Rule 4-42-5). Is team control established when throw in ends or when a player gains control?

Reason for this questions is this situation: which their appears to be contradicting case book situations for.

When a ball is thrown in from out of bounds by A1 is touched by A2 or tapped by A2 from the frontcourt into the back court (never controlled by A2 ) can someone from A2's team be the first to touch it in back court?

Look at NFHS 2009-10 Case Book 9.9.1 Situation D and 4.12.6 (b). These two situations seem to contradict each other. Please help!!