RSL ... I had the same exact play you are describing in a Holiday tournament between two rival high schools. With 8 seconds to go in regulation, the score tied and the home team in possesion of the ball, exactly what you described happened.
I made the call and the home coach and crowd went nuts.
Immediately I realized nobody in the gym new the correct rule. So, I decided to go explain to the coach - he wanted no part of it. As I walked away to continue the game, my partner (2-man crew) came to me and said I had made the wrong call. He said in such away that the home coach heard it.
The visitors failed to score and we went into overtime and the home team did win.
After the game I showed my partner the rule and also showed the home coach the rule - he came to speak with me about it. He still did not believe me and check with our association assignor - a guy he knew and respected.
Long story short - they all know now!
