@Mike Dickson The short answer - yes.
Any business using SMS/texting for one-offs, appt. reminders, friendly updates, texts to internal team members, or informational shares has to register the same as businesses that do big marketing campaigns via text.

So reading the CTIA-Messaging-Principles-and-Best-Practices- If we initiate the conversation p2p we have to include a "Stop" option in the message?

Where can I find the guidelines you supplied?

Is there a hard cutoff date for our SMS messaging if the campaign is not approved by March 31st 2023?