Yes. You must have the borrower's acknowledgment they received the notice.
The only difference in the flood insurance process between a property located in a SHFA in participating community and one located in a SFHA in a non participating community is you don't have to require flood insurance on the property in the non participating community to make the loan. All other provisions will apply, including re-notification if you increase, renew/refinance or extend the loan.
The opinions expressed are mine and they are not to be taken as legal advice.