Throw-ins: Sideline or Endline?

[actuary77]

I just started officiating basketball and one of the things I am unclear about are throw-in locations.

Both the NCAA and NFHS rule books says that (in most situations) throw-ins occur "at the spot nearest where the violation occurs". Of course, this excludes situations where the throw-in will be at the division line like double fouls, technical fouls (for HS), etc.

I know that when the ball goes out of bounds, the location of the throw-in is the spot where the ball went out of bounds. And for violations or fouls that occur considerably far from the end line (e.g. beyond the 3-point line), the throw-in will be from the sideline.

How about for violations and fouls that occur close to the end line, specifically from the free-throw line extended to the endline? Should the throw-in be from the sideline or the endline?

I know that in the NBA, only out-of-bounds situations result in endline throw-ins. All other violations have sideline throw-ins.

I have scoured the NFHS and NCAA rule books from cover to cover for the answer to this but I haven't found any.

Please help, for believe it or not, some of the players in the league I officiate in started questioning the locations of the throw-ins.