10 second count, when does it start?

[Ed Maeder]

9-8 states that "A player shall not be, nor may his/her team be, in continuous control of a ball which is in his/her backcourt for 10 seconds." There is no team control or player control on a throw-in (4-12-6), so until the throw-in has ended there can be no player or team control. The count would start when player control is established after the throw-in ends.