Restraining Line

[Jurassic Referee]

Originally Posted by DesMoines

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Question: Was the throw in after a made basket? OP didn't say, but couldn't an offensive player cross the line for an OOB throw to a teammate? (As long as they were established OOB when they caught the pass, then passed it in bounds rather than dribbling up court?)

Rule: 1-2-2
If, on an unofficial court, there is less than 3 feet of unobstructed space outside any sideline or end line, a narrow broken line shall be marked on the court parallel with and 3 feet inside that boundary. This restraining line becomes the boundary line during a throw-in on that side or end, as in 7–6. It continues to be the boundary until the ball crosses the line.

You answered your own question. Yes, as per 1-2-2. The restraining line is treated as a boundary line in all respects on a throw-in until it disappears.