i hear tell that he and his ppl demanded that he receive 50% of the publishing rights on any song he covered. which is part of why he didn't record Dolly Parton's 'I Will Always Love You'; she wouldn't give up half of her publishing rights.

that's not quite the same as the Yonce requirement.

i think Mariah Carey has one too. the Neptunes refused to play along on 'Say Somethin'. i heard them or someone from their camp mention it.

i've suspected Madonna has 1, but i've also heard/read producers say she gets involved in production of her music. so i dunno. but she's credited as a co-producer on just about everything she's released since the mid or late 80s.