Counting Players

[JLC]

Tuesday night was watching our Stillwater boys varsity game. Good close game (we won by 2). We came out of a time out in the 4th quarter with 6 men. Ball put in play and a quick T was called. I was sitting by a couple of friends who are refs. I said I realized it was the team's responsibility to get the correct number of players on the court, but wouldn't have happened if the refs had counted the players. (got that from following this board). They said they never do, but some may do it as a courtesy to the teams? Got me to wondering, do most who post here do player counts? If so, when (only when subs come in, after time outs??). Is this mentioned in the officials handbooks, or was it just picked up for better game management? Thanks.