Q. Must carriers permit passengers with a disability to travel with service animals?
The Federal Aviation Administration is the Operating Administration within the United States Department of Transportation that enforces regulations on air travel with service animals. You can read the entire regulation - 14 CFR § 382.117 - online at http://www.gpo.gov/fdsys/pkg/CFR-2014-title14-vol4/pdf/CFR-2014-title14-vol4-sec382-117.pdf
This regulation stems from a formal rulemaking that took place in 2008. The entire set of documents that accompanied the rulemaking, including letters from the public both for and against the ruling, can be reviewed at https://www.regulations.gov/document?D=DOT-OST-2009-0093-0002
We can tell you that we have received volumes of comments similar to yours from fellow air travelers. We can also tell you that a forum was held here at United States Department of Transportation headquarters in November to discuss possible modifications to this rule. We understand that our Office of Aviation Consumer Protection is considering a formal Proposed Rulemaking and when that is made public, ample opportunities will be given for the public to weigh in on the proposed changes.