Aerosmith lead singer Steven Tyler has, for the third time, asked President Trump to stop using his songs during rallies.

The Aerosmith song “Livin’ on the Edge” played at a Trump rally in Charleston, W.Va., on Tuesday, prompting the band frontman to send a letter to the White House through his attorneys.

“Mr. Trump does not have our client’s permission to use any of our client’s music, including ‘Livin’ on the Edge,'” says the cease and desist letter.

It’s not the first time such a skirmish has come up between Tyler and Trump. The president was twice asked in 2015 not to use Aerosmith’s “Dream On” during his campaign.

Citing the Lanham Act, which prohibits false advertising, attorneys for Tyler said Trump using Aerosmith’s music sows confusion among the band’s fans and implies that Tyler supports the president.

“As we have made clear numerous times, Mr. Trump is creating the false impression that our client has given his consent for the use of his music, and even that he endorses the presidency of Mr. Trump,” the letter says. “By using ‘Livin’ On The Edge’ without our client’s permission, Mr. Trump is falsely implying that our client, once again, endorses his campaign and/or his presidency, as evidenced by actual confusion seen from the reactions of our client’s fans all over social media.”

According to the letter, Trump requires Tyler’s written permission to use his music.

Tyler, using all caps, weighed in on the matter on Twitter:

Get our Politics Newsletter. The headlines out of Washington never seem to slow. Subscribe to The D.C. Brief to make sense of what matters most. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Mahita Gajanan at mahita.gajanan@time.com.