[officialtony]

In Ohio the HSAA states that schools shall use:
* 9th - 1 class 1 or class 2 official
* JV - 2 officials either class 1 or class 2
* Varsity - two officials, the Referee shall be a class 1 and the Umpire may be class 1 or class 2.
With freshman, I have found that one official is not too bad. Also many school systems here use two officials for freshman, even though they are not mandated. The only way Varsity and JV matches are conducted with one official is bcause one official did not show up AND both coaches agree to use the existing offcial. One note here is that a class 2 CANNOT be the Referee in a Varsity match if he is the only official there. He ( she ) risks a sanction and discipline by the State HSAA for doing so. The match must be postponed or another official may try to be reached.
When doing a match alone, I have not used a line-up card to track substitutions and only call alignment violations if they are obvious enough for me to pick up very quick. However, I spoke with a veteran about this a week ago and she uses a line-up card on the ladder to be sure substitutions are done correctly AND to watch for alignment violations. God bless her! I just don't feel like I can do that yet ( 3 year rookie ) and still allow the game to move and flow quickly. I would feel like I am slowing the game down too much. I am probably wrong for this, but see no way ( yet ) to do this smoothly.
I could NEVER have done the Varsity match last night alone. I would have missed so much just because of the pace of the game.
To answer one more of your questions, Ohio has used two officials for JV & Varsity for as long as I have watched/officiated volleyball - which is 6 years. So I cannot tell you how it was lobbied to get two officials at the contests.
Good Luck!