not true:
ctcp *:dcc send:*: $iif($len($nopath($filename)) >= 225,halt) ;comment
;ctcp *:dcc send:*: $iif($len($nopath($filename)) >= 225,halt)
ctcp *:dcc send:*: ;$iif($len($nopath($filename)) >= 225,halt)
ALL the above are legal. However placement of the semicolon in the wrong place my break your script