Steve makes another good point: that the definition of sewage is very specific, and always includes some sort of collection and conveyance. 261.11 does not say human waste, or solid waste, as the Whitney Zone WAG Bag material does. So tested by plain common or dictionary standards, which is the first principle in all legal interpretation, 261.11 does not even apply to human waste deposited in a hole in the back country, so the practice cannot be a violation. USFS may be quite aware of that, and it is the best explanation of why it approved Wasson's notice of intent and does not even mention packing out waste from Wilderness.
