Syntax: VOP channel ADD nick
        VOP channel DEL {nick | entry-num | list}
        VOP channel LIST [mask | list]
        VOP channel CLEAR
Maintains the VOP (VOicePeople) list for a channel.  The VOP list allows users to be auto-voiced and to voice  themselves if they aren't.
The VOP ADD command adds the given nickname to the VOP list.
The VOP DEL command removes the given nick from the VOP list.  If a list of entry numbers is given, those entries are deleted.  (See the example for LIST below.)
The VOP LIST command displays the VOP list.  If a wildcard mask is given, only those entries matching the mask are displayed.  If a list of entry numbers is given, only those entries are shown; for example:


  VOP #channel LIST 2-5,7-9
      Lists VOP entries numbered 2 through 5 and
      7 through 9.
      The VOP CLEAR command clears all entries of the VOP list.
The VOP ADD, VOP DEL and VOP LIST commands are  limited to AOPs or above, while the VOP CLEAR command  can only be used by the channel founder.
This command may have been disabled for your channel, and in that case you need to use the access list. See  /msg ChanServ HELP ChanServ for information about the access list, and /msg ChanServ HELP SET XOP to know how to toggle between  the access list and xOP list systems.