as the author of the 2009 SPCNS document , I am proud that it has helped real people make a sensible pathway of the process.
In our recent experience, BAR is requiring a enclosed PCV system that feeds the blow-by air from the air cleaner vs a stand alone vented
oil filler cap.
this was actually a 1966' change to the cars, and while it is not technically correct, it will save .00034 polar bear pelts per Millennial equinox, so they are making us do it, - whatever.
the process still works , and you drive your dream. That is what matters.
Steve