LOS ANGELES (AP) — Priscilla Presley is challenging an alleged trust amendment for her daughter, the late singer Lisa Marie Presley, that would give her grandson control of rock and roll’s most illustrious estate.

Lisa Marie was 54 years old when she died on January 12 in Los Angeles. On Thursday, an attorney representing Priscilla filed a petition in Los Angeles County Superior Court challenging an amendment to Lisa Marie’s trust that would give Lisa Marie’s daughter, Riley Keough, 33, control of the trust and, in fact, the estate of Elvis Presley.

The filing by attorney Brian M. Malloy argues that a document purporting to amend the trust to remove Priscilla as trustee is invalid.

It alleges that Priscilla was not notified, as required, of the amendment, which only exists as a PDF copy, includes a signature that claims to be Lisa Marie’s but appears inconsistent with her handwriting, and has Lisa Marie’s signature on one page blank with no amendment-related language.

While Priscilla and business manager Barry Siegel are named as current trustees, the potential 2016 amendment would essentially shift that responsibility. to Keough. He also named his brother, Benjamin Keough, as a trustee before his death in 2020.

The petition seeks the court to declare the alleged amendment invalid and a 2010 version of the trust, with Priscilla and Siegel acting as co-trustees, in effect.

The petition states that Siegel is likely to leave the trust arrangement soon, which would give Keough a place as a co-trustee along with his grandmother.

Representatives for Keough, Lisa Marie and Priscilla did not immediately respond to a request for comment. Attorneys for Siegel and Priscilla also have not responded to requests for comment.

Priscilla, 77, is believed to have successfully revived Elvis’s estate during his darkest days of debt. She wants to retain control of the trust, the filing states.

It’s unclear how much money could be at stake. The estate has seen its ups and downs, including reports of debt and estimates of a nine-figure value.

In 2005, Lisa Marie sold a significant portion of her interests in Elvis’s business, and at his death retained a 15% ownership in Graceland Holdings, the parent company of Elvis Presley Enterprises. The latter operates Graceland, the tourist destination that is Elvis’ final resting place, and licenses related products, music tours and events.

Lisa Marie was the full owner of Graceland Mansion in Memphis, Tennessee, according to the attraction. That includes his more than 13 acres, as well as many of Elvis’s remaining personal effects, such as costumes, costumes, prizes, furniture and cars, according to Graceland.

“She has made her father’s mansion property and personal effects permanently available for tours of Graceland,” he says.

Lisa Marie, whose cause of death has not been determined, was buried at Graceland, her childhood home, along with her son Benjamin.

A spokesperson for the estate formerly saying Lisa Marie’s three surviving children, Keough and twins Harper and Finley Lockwood, would inherit Graceland.