[just another ref]

Originally Posted by Nevadaref

If it is a CE then the goal can be cancelled even after the 2nd half has started. The officials would have until the first dead ball after the clock has properly started in the 3rd quarter becomes live to make the correction. If it is merely a help situation, then once the ball becomes live to begin the 3rd quarter the goal must stand, just like any OOB call. It's too late to fix it once play restarts.

Got all that. But since the OP takes place going into halftime, the correction would pretty much be made then or not at all. Can we think of an example when the time restriction would come into play on the "erroneously counting or canceling a score" part of this rule?