On February 23, 2023, in Cargo Systems Messaging Service (CSMS) #55230568, U.S. Customs and Border Protection (CBP) issued guidance on the extension of certain COVID-19 related Section 301 product exclusions originally announced in Federal Register Notice (FRN) 88 FR 8027.
The exclusions are extended through May 15, 2023. They can be claimed under 9903.88.66.
CSMS #55230568 includes details on entry submission and can be found here:
https://content.govdelivery.com/accounts/USDHSCBP/bulletins/34ac068?reqfrom=share
88 FR 8027 can be found here: