What are the official rules and requirements for the Thailand OA visa?

in order to get the maximum benefit of that 2nd Year, don't forget to have a fresh insurance policy validity for a full year before entering Thailand on the last entry of the original validity of the Non–OA.

Then, after making entry into Thailand, don't forget to obtain a Re–Entry Permit (Single or Multiple) before exiting Thailand in order to continue to make use of that 2nd Year

When getting the 2nd year entry, you must buy a single or multiple re-entry permit to keep your permission to stay stamp alive if you plan on leaving the country. The multiple entry benefit of the original visa is not carried over once the visa validity date has expired.

Yes if you exit and recenter Thailand you’ll be stamped back in for 1 year as long as you have insurance for a second full year so if you have 6 months insurance you’ll get 6 months once you get your bank account sorted you might want to switch to a non-o as no insurance,medical statements or police reports so on your 3 year you’ll need to show funds in Thailand

At entry into Thailand during the visa validity you get a 365 days of Admitted to stay OR until the last day of your health insurance, which ever comes first.

So be aware that you have at least a 1 year valid insurance if you want to re-enter Thailand during the visa validity.

At arriving at an address you need to report that stay at that address at the local Immigration Office, your hotel or land lord may do this but discuss this with them.

IF you stay 90 days consecutive inside Thailand you need to report this at your local Immigration Office.

There is not one document that covers all of those regarding only Non-OA. Those are on police orders with partial revisions. You have to follow all related police orders if you want to see exact official documents. You can check the Immigration Bureau for some of those.

You need to check all related and pick what is related to you by yourself.

But here are some that may related to you.

- Every foreigner who stays longer than 90 days on a Non-immigrant basis visa or extension is obligated to report 90 days

- All multiple-entry visas including Non-OA let you enter Thailand for visa-specific length until the last day of visa validity (<- this is how Non-OA visa holders get a "second" year and not an extension)

- You can apply for an extension at the end of the "permitted to stay" period at the local immigration office for the same reason for the visa by meeting the requirements of the extension that are not the same as the visa itself (<- this is different from second year directly from visa)