The fifth meeting of that committee has already met September 21-23https://www.transportation.gov/access-advisory-committee
This is very early in the process and really of interest only to those who live in the Washington D.C. Area. They're still a minimum of a year away from making any changes to the ACAA regulations and there will be a public comment period before they do. That public comment period is when we give input.
This committee will advise the DOT which will write up it's first draft called the "Notice of Proposed Rulemaking" (NPRM) which will be published in the Federal Register. At that time there will be a call for public comment, which will be posted on the forum. Everyone can see the proposed wording of the changes and where to send their comments.
Then the DOT will spend a few months reading all the comments, considering them, addressing them (either agreeing or disagreeing with them) and then they will publish their Final Rule (FR), which is the changed regulatory law.
What do we know? We know the DOT is pro-ESA to the point of considering adding them for all public transportation, not just aircraft. Too pro-ESA in fact. They're the ones who created the confusion about the differences between ESAs and PSDs way back in 2002. To this day it is unclear that the DOT understands the difference. They've created the most massively abused regulation concerning service animals and ESAs in the world. And then in an attempt to fix it, I think around 2009, they discriminated against those with mental illness based disabilities by separating them out from other disabilities and treating them less favorably.
This is another attempt to fix the problem. Yes, more regulation is needed, desperately. It's about time. I'd be very pleased if they once and for all ruled on the companies selling ESA letters over the Internet. I'd be pleased to see some limitations on species, perhaps what the DOJ had in their first draft of the 2008 changes to the ADA. Exclude non-human primates, farm animals and exotic animals. Require toilet training as a condition of access and that animals be harnessed, leashed, or caged and under control. Some clarity about animals in laps during take off and landing since that conflicts with other laws.
The way the system is set up now, very few who actually use emotional support animals are going to make it through the gauntlet to use one while the system leans hard to favor celebrities who want to travel with pets.
They also need to make the letter absolutely clear that the individual is DISABLED by mental illness, not just diagnosed with a mental illness.
But again, the time for public comment is not yet here. Sending comments now won't change anything.