Yes, if your follow-up is telemarketing. Texas bars calls and texts to listed numbers 60 days after they appear. What the list is, the exceptions and the penalties.
The short answer
Yes, if your follow-up counts as telemarketing to Texas consumers. Texas runs its own no-call list, and the Texas Telemarketing Disclosure and Privacy Act bars telemarketing calls to a number on that list more than 60 days after the number appears on it. Calls include texts to mobile numbers.
What the Texas no-call list is
You might think scrubbing against the national Do Not Call Registry covers you in Texas. The Texas list is a combined list. Under Business and Commerce Code Chapter 304:
Who runs it (304.051): the Public Utility Commission of Texas.
What's on it: Texas consumers who asked to be added, plus the Texas portion of the national registry.
When it updates: January 1, April 1, July 1 and October 1 each year.
The rule (304.052): no telemarketing call to a listed number more than 60 days after it appears on the current list.
How long entries last (304.053): three years from first publication, and they can be renewed.
Texts count (304.002): a "telephone call" includes a text or image sent to a mobile number.
Section 304.004 says the chapter doesn't apply to some calls, including:
Calls made by the consumer in response to a seller's solicitation.
Calls tied to an established business relationship. The law defines that as a voluntary two-way communication about a consumer good or service you offer that neither side has ended.
A business relationship that has ended, but only until the later of the first Texas list that includes the number or one year after the relationship ended.
Business-to-business calls, unless the business has asked you to stop.
Debt collection calls.
A lead who filled out your form and talked with you may fit the established relationship exception. A purchased list of strangers usually won't.
What a violation can cost
PUC (304.251): an administrative penalty of up to 1,000 dollars per violation.
Attorney General (304.252): a civil penalty of up to 1,000 dollars per violation, or up to 3,000 dollars if wilful or knowing.
Consumers (304.257): a listed consumer called more than once can sue on the second or later violation after notifying the caller and filing a complaint, with damages of up to 500 dollars per wilful or knowing violation.
The PUC must also adopt rules so an isolated call isn't a violation if you have adequate procedures in place (304.058).
How we'd set it up
Our suggestions, not legal requirements:
Pull the Texas list each quarter and scrub within the 60-day window.
Record how each lead reached you, so you can show the relationship if asked.