~OLCommand :~RS promote
~OLUsage   :~RS promote <user> [<level>]

Will promote a user to the next level up in the ranks list.  You cannot
promote above the highest level, and you cannot promote anyone of the same or
higher level as you.  You can also promote a user even if they are not logged
on.  If the <level> option is used then the user will be promoted directly
to that given level, rather than the level above what they currently are.