I've been to HHH with Mrs BB this morning, and they have told her to get registered as disabled. Not because of her periodic leg problems, not because of her breathing problems, but because she has a hearing problem

She was given a letter, which she had to take to the Tessebahn. Tessebahn will now request the permit from Prachuap Khiri Khan, Provincial HQ, which will take about a month.
It is strange, because I've been using disabled facilities fairly regularly since about 2018, and have never been questioned.