Mine

on *:invite:#: { 
  join $chan 
  .timerinvite 1 1 .signal invite $chan $nick 
} 
on *:signal:invite: { 
  if (($2 isop $1) || ($2 ishop $1)) { msg $1 Thanks for inviting me } 
  elseif (($2 isreg $1) || ($2 isvoice $1)) { Part $1 You must be Halfop/Op to invite me } 
}