| From the 2005 handbook (bad punctuation and all);
"Oil Catch tanks & breather systems. Where an oil breather is fitted the outlet must discharge into a catch tank located in an easily accessible position and which must be emptied before the start of the race. The minimum size of a catch tank shall be 250cc for gearbox breather pipes and 500cc for engine breather pipes."
This is not an altruistic gesture - it's my bike that he's got to fit it to! | 
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