Ivanka Trump
Ivanka Trump attends U.S. President Donald Trump's strategy and policy forum with chief executives of major U.S. companies at the White House in Washington, Feb. 3, 2017. REUTERS

First daughter Ivanka Trump will become a federal employee as part of her new White House position, reversing course just hours after Elizabeth Warren asked the Government Ethics Office to clarify her role.

Last week, reports indicated Ivanka Trump would receive a White House office and security clearances as part of her new role as an informal adviser to her father, President Donald Trump. But the informal role prompted many, including Sen. Elizabeth Warren, D-Mass., to question what ethics rules would apply to the president's eldest daughter, whose husband, Jared Kushner, is a White House senior adviser. Federal employees are required to disclose various personal records and adhere to ethics laws.

Read: Jared Kushner Timeline: From Ivanka To Russia, How Trump's Son-In-Law Became So Powerful

"I have heard the concerns some have with my advising the president in my personal capacity while voluntarily complying with all ethics rules and I will instead serve as an unpaid employee in the White House Office, subject to all of the same rules as other federal employees,” Ivanka Trump said in a statement Wednesday. She previously said she would voluntarily comply with all ethics laws.

Warren and Sen. Tom Carper. D-Dela., sent a letter early Wednesday to the Office of Government Ethics asking how the office would ensure Ivanka Trump voluntarily adhered to ethics laws, and which ethics laws would apply to her if she wasn't a federal employee.

It is "important to determine which ethics rules apply to Ms. Trump, which disclosures she will be required to make to demonstrate her compliance, and whether her compliance with these rules will be monitored and enforced," the lawmakers wrote.

"If Ms. Trump is not following relevant laws, precedents, and legal opinions, what are the consequences for her? Which government officials are responsible for determining and enforcing these consequences?"

Shortly after he was elected, President Trump denied he was seeking security clearances for his children. Now Ivanka Trump, who has met with foreign leaders as part of her father's administration, will have one.