The Stop Spam Calls Act directs the Federal Communications Commission to revise its regulations defining "prior express written consent" within one year of the bill's enactment. The revision requires the FCC to adopt a definition from a January 2024 FCC rule on unlawful text messages and robocalls, making it clear that businesses must obtain written consent before sending marketing calls or texts to consumers. The new definition takes effect 18 months after the bill becomes law, giving businesses time to update their compliance practices. This legislation affects telemarketing companies, text message services, and any business that contacts consumers by phone or text for marketing purposes. The bill does not include specific federal funding allocations, as it primarily requires the FCC to clarify existing regulatory language to strengthen protections against spam calls and unwanted marketing messages.