Compressed Air Best Practices, Mar. 2014, by Roderick Smith.
http://www.airbestpractices.com/industries/food/compressed-air-system-design-recommendations-food-processors

"The codes and recommendations put forth by the BCAS/BRC and by the VDMA provide the compressed air user and specifier in the food industry with some VOLUNTARY guidelines to consider when designing a compressed air system. The key word here is “voluntary”. These recommendations do not recommend the involvement of any inspectors or the creation of new regulations. The compressed air industry has simply shared very solid, unbiased, and practical recommendations to the food industries in their respective countries."