You didn't finish reading R72:
Quote:
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For the purposes of the FIRST competition, a device that creates a vacuum is not considered to be a pneumatic device and are not subject to the pneumatic rules (although they must still satisfy all other appropriate rules). These include, but are not limited to, venturi-type vacuum generators and off-the-shelf vacuum devices (as long as they are powered by provided or permitted motors).
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Therefore, R72 does not apply to your shop-vac.
{edit} I think you're misinterpreting the word "provided". Provided means "in the KOP", not "provided in the COTS vacuum".