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Where do I find the form to ask an NFPA Code related question?

Question asked by denysedbq on Jun 7, 2018
Latest reply on Jun 14, 2018 by chiefns830

I have a question regarding NFPA Code 55, "where is liquid Nitrogen and its evaporated gas discussed?" and have lots of information to submit on the topic.   But being at XCHANGE, I only find what others submitted.  Where can I ask my question?