Set:

on *:text:.autov*:#:{ if ($nick isop $chan) { 
    if (%autov $chan == on) notice $nick 12Auto voice is already set with your channel! If you wish to remove it, type .deautov
    set %autov $chan on
notice $nick 12Your channel now has auto voice4 ON12. } }

Off:

on *:text:.deautov*:#:{ if ($nick isop $chan) { 
    if (%autov $chan == off) notice $nick 12Auto Voice is already set off with your channel! If you wish to turn it on, type .autov
    set %autov $chan off 
notice $nick 12Your channel now has auto voice4 OFF12. } }

Join:

on *:JOIN:#:{ 
  if (%autov $chan == on) mode $chan +v $nick
  notice $nick 1-12 Hello $nick $+ , and welcome to $chan $+ ! To get started using my commands type ".mainc" 1- 
}