Trump named it.
‘The National Emergencies Act (NEA) (Pub.L. 94-412, 90 Stat. 1255, enacted September 14, 1976, codified at 50 U.S.C. § 1601-1651) is a United States federal law passed to end all previous national emergencies and to formalize the emergency powers of the President.’
Of course under the Act, he has to formally declare an emergency before he can use the powers, and Congress can terminate any measures he orders at any time.
didn’t nixon use it more than once