Counting 7 on the line

[jaybird]

We have the H and L count the players on the line on their side of the snapper, then signal to one another their count. The total must be six as the snapper is a given.
This method allows the LOS officials to keep their main focus on the LOS to watch for pre-snap and neutral zone infractions instead of looking for the R/U who could be several yards from the LOS or looking for backs thus once again, taking the main focus off the LOS.