la dichiarazione EUA viene usata in caso di emergenze (non solo sanitarie), e in questo contesto ha proprio senso, perché giustifica il fatto che la licenza non ha ancora una data di scadenza. Io lascerei la sigla così com'è, magari con una nota del traduttore.

A. EUA DECLARATION JUSTIFYING EMERGENCY USE
1. Determinations to Support an EUA Declaration

Before FDA may issue an EUA, the HHS Secretary must declare that circumstances exist justifying the authorization (section 564(b)(1)). This declaration (referred to in this guidance as an “EUA declaration”),12 must be based on one of the following actions:

A determination by the Secretary of Homeland Security that there is a domestic emergency, or a significant potential for a domestic emergency, involving a heightened risk of attack with a CBRN agent(s);13
A determination by the Secretary of Defense that there is a military emergency, or a significant potential for a military emergency, involving a heightened risk to United States military forces of attack with a CBRN agent(s);14
A determination by the Secretary of HHS that there is a public health emergency, or a significant potential for a public health emergency, that affects, or has a significant potential to affect, national security or the health and security of United States citizens living abroad, and that involves a CBRN agent or agents, or a disease or condition that may be attributable to such agent(s);15 or
The identification of a material threat, by the Secretary of Homeland Security pursuant to section 319F-2 of the Public Health Service (PHS) Act, that is sufficient to affect national security or the health and security of United States citizens living abroad.16