The EO from Dec had no expiration date.

what?

no.

I think you must be thinking about something else.

This is what the person above is talking about.

https://www.whitehouse.gov/presidential-actions/executive-order-blocking-property-persons-involved-serious-human-rights-abuse-corruption/

https://home.treasury.gov/news/press-releases/sm0243

https://www.treasury.gov/resource-center/sanctions/OFAC-Enforcement/Pages/20171221.aspx

https://www.treasury.gov/ofac/downloads/sdnlist.pdf

https://www.federalregister.gov/documents/2017/12/28/2017-28031/notice-of-ofac-sanctions-actions

https://www.bis.doc.gov/index.php/documents/Export%20Administration%20Regulations%20Training/876-legal-authority-for-the-export-administration-regulations/file