mf_pvp_nocalcrank
try
mapname mapflag nocalcrank
or
OnInit:
setmapflag "mapname",nocalcrank;
if you want this to get initialized upon @command...
you can try use
bindatcmd "command","<NPC object name>::<event label>"{,<atcommand level>,<charcommand level>};
bindatcmd("command","<NPC object name>::<event label>"{,<atcommand level>,<charcommand level>});