I found that there were actually TWO erratas in Diario Oficial. We only have the first one:
But also there was a second:
The change is in bold in the second document, and clarifies that the entire municipality of Ensenada follows US rules, not just the city of Ensenada.
I'm not sure what this means with regard to San Quintin, but if it's following the letter of the law as currently written then it would currently be following US rules, and later when it officially becomes its own municipality then it would follow Mexican rules (unless they later change this).
Date: Sat, 10 Oct 2015 09:24:36 -0400
Subject: Re: [tz] America/Santa_Isabel
From: arthurdavidolson@gmail.com
To: mj1856@hotmail.com
CC: eggert@cs.ucla.edu; gregsla@microsoft.com; tz@iana.org
It's a daytimer, the web page says it broadcasts from 5:00 a.m. until 7:00 p.m. Streaming wasn't working for me today here in Maryland until shortly after 9:00 a.m.; I'm now (~9:15) hearing a Spanish-language announcer who has mentioned the date, meaning it should indeed be a live stream. I haven't yet heard a time announcement, and I'm surprised the streaming started at 9:00 my time rather than 8:00 my time.
We'll see what happens in the coming days and weeks--in particular between October 25 and November 1. (If nothing else, we may produce a spike in XEQIN's ratings.)
--ado