Cheryl “Salt” James and Sandra “Pepa” Denton filed the lawsuit in federal court in New York on Monday asserting that the copyright act of 1976, which says that after several decades artists can terminate previous agreements and reclaim ownership of their recordings, clearly now applies to them.

The hip hop duo have officially sued the record label, claiming UMG is violating copyright law by refusing to give back their master recordings.

Renowned hip-hop group Salt-N-Pepa will be inducted into the Rock & Roll Hall of Fame in November. Before then, they are putting up a legal fight to obtain the rights to their extensive music catalogue.