May 21 (Reuters) - A powerful U.S. national security

panel on Wednesday submitted a recommendation to President

Donald Trump on Nippon Steel's ( NISTF ) fraught $14.9 billion

bid for U.S. Steel, a person familiar with the matter

said, without providing further detail on its contents.

The submission complies with an executive order signed by

Trump last month, which tasked the Committee on Foreign

Investment in the U.S. with outlining whether any measures

proposed by the companies assuage the national security risks

previously identified by the committee.

Reuters could not learn the content of the committee's

recommendation.

Trump will now have 15 days to decide the fate of the

transaction, although the timeline could slip.

The companies and the Treasury Department, which leads

CFIUS, did not immediately respond to requests for comment.

Following a previous CFIUS-led review, former President Joe

Biden blocked the deal in January on national security grounds.

The companies sued, arguing they did not receive a fair

review process. The Biden White House rejected that view.

Reuters reported earlier this week that Nippon Steel ( NISTF ) has

floated plans to invest $14 billion in U.S. Steel's operations

including up to $4 billion in a new steel mill if the Trump

administration green lights its merger bid, in response to

requests from the government for more investment.

The April directive asks for a statement describing the

position of each agency that is a member of CFIUS as well as the

reasons behind it.