Adam Yauch's will prevents his music being used in adverts.
The Beastie Boys rapper - known as MCA - passed away from cancer in May aged 47, and his will lists a clause preventing his music or art being used in adverts or promotions.
It reads: ''Notwithstanding anything to the contrary, in no event may my image or name or any music or any artistic property created by me be used for advertising purposes.''
Rolling Stone magazine noted the last part of the line was added in handwriting.
The will also leaves his fortune of £4.1m million to Yauch's wife, Dechen Yauch, and their 13-year-old daughter. Dechen also has the right to sell and manage her husband's artistic property.
It is not clear how the will's wording affects the potential use of Beastie Boys' music in adverts in future, as the band also comprises Adam 'Ad Rock' Horovitz and Michael 'Mike D' Diamond.
Yauch was diagnosed with cancer of the salivary gland in 2009 and underwent surgery and radiation therapy.
The band released their 'Hot Sauce Committee Part Two' album in April and were also inducted into the Rock 'n' Roll Hall of Fame shortly before Adam's death.
Michael and Adam are currently engaged in a court battle with Monster Beverage Corporation over allegations of copyright infringement, for using their tracks without permission.