Do I need to leave Thailand every 90 days with a NON O multiple entry visa based on marriage?

As

@Robert ******

pointed out, in Sisaket same. Plus the last day of your nearly 15 month get an extension from 60 days , for visiting family ( 1900 Baht) . Have done it the last 3 years.

@Chris *******

No new TM30 if no change in address. Just bring your passport with the new TM6 and prior TM30 receipt to Chiangmai Immigration by the next day. TM30 submission/update is available EVERY day, 0830-1600 hrs, even for announced office closures. Just went today.

In Chang Mai they enforce this. So after every new entry in Thailand you visit the Immigration Office to update.

No, depends on where you live. Some Immigration Offices want you to update your address registration every time you've been abroad.

@Chris *******

yes

@Phil *****

not at poipet, they want you to spend one night in Cambodia.