Although the ethical and security concerns about the president's jumbo jet gift are blatant, experts tell ABC News that the legal ramifications are more complicated.

Any donation to this government is always done in full compliance with the law,” White House press secretary Karoline Leavitt said Monday.

Described as a "palace in the sky," this 13-year-old aircraft is valued at approximately $400 million. The jet's opulent configuration and potential as the most valuable gift ever extended to the U.S.