The Stafford Act allows the Trump administration to throw around plenty of cash, but it doesn’t let the president do anything truly crazy — like postpone the 2020 election or suspend the rule of law.
— Read on www.vice.com/en_us/article/7kzmme/heres-what-trump-can-do-in-a-coronavirus-national-emergency

Statutes Available Upon Declaration of a National Emergency

21 U.S.C. § 360bbb-3

Secretary of Health and Human Services may authorize the use of an unapproved drug, device, or biological product, or an unapproved use of an approved drug, device, or biological product (2004)