Looks like Red is in the same boat as Rob. He would have no idea where to find information like this. But most real players and almost all real AP players do know.
It isn't a secret. I am just pointing out the kind of people like Rob and Red that talk about things they have no idea about.
AND I actually gave the answer yesterday in an unrelated post. So here it is for you geniuses. Wongs BJ21 has a monthly report of conditions and rules that can be purchased as a one time purchase or on a subscription. They have paid reporters that report the first of each month. And for Las Vegas the report is pretty accurate with one caveat. A local reporter sometimes holds back or doesn't share really good conditions of a game on his route, saving it for himself. The reporters all deny this though.But overall for Las Vegas it is pretty accurate. Other states and areas, not always as accurate. Depends on if they even have a reporter for that particular area. If not information can be months or even several years old.
Wizard also has a free blackjack survey reporting the same conditions at casinos throughout Vegas. That is also pretty good. Not sure just how often it is updated or who does it, but it is pretty accurate.
But most real players only use these as a guide anyway, so you purchase the report once or twice a year to see if there any changes somewhere you might not know about and then go check for yourself. Because every real player puts more stock in their own scouting than these different reports.
One other thing to remember about these reports as well as your own scouting is that they are only a "snapshot" of conditions at that particular moment in time. It isn't unusual for condition and rules (more conditions like penetration that actual rules) to change from one day to the next, depending on a variety of things. For example, if a casino has encountered a team or even single higher end counter, that they took countermeasures against, they sometime tighten up for a short period.