When to start 10 second count?

[Nevadaref]

2008-09 NFHS Basketball Rules Interpretations

Publisher's Note: The National Federation of State High School Associations is the only source of official high school interpretations. They do not set aside nor modify any rule. They are made and published by the NFHS in response to situations presented.
Robert F. Kanaby, Publisher, NFHS Publications 2008

SITUATION 8: A1 is dribbling in his/her frontcourt when B1 deflects the ball into A's backcourt. The ball is bouncing toward the end line in A's backcourt while A1 and B1 give chase. B1 and A1 each contact the ball, but neither gains control. Finally, after numerous attempts by each player, A1 gains possession deep in A's backcourt. When does the 10-second count begin anew for Team A? RULING: The count starts as soon as the ball goes into the backcourt since team control has not ended. (4-12-3; 9-8)