The head of the Federal Communications Commission introduced a proposal Wednesday that would require political advertisers to disclose when they use AI-generated content in broadcast TV and radio ads.

The proposal, if adopted by the commission, would add a layer of transparency that many lawmakers and artificial intelligence experts have been calling for as rapidly advancing generative AI tools produce lifelike images, videos and audio clips that threaten to mislead voters in the upcoming U.S. election.

But the FCC, the nation’s top telecommunications regulator, only has authority over TV, radio and some cable providers. Any new rules would not cover the explosive growth in advertising on digital and streaming platforms.