Below is one of the websites you can find the details regarding any curfew changes etc.
https://jis.gov.jm/

For entry into Jamaica...you are required to follow the rules and fill in the forms for travel authorization on the VisitJamaica website. They've been great with updating the entry requirements as they happen...
https://www.visitjamaica.com/travelauthorization/

There are other websites including the Prime Ministers page that can be followed but they often get convoluted or lack details needed.

We've been sorting through and contacting the correct authorities the last couple of years to keep everyone updated on Negril.com.
Anytime there's been updates to the entry into Jamaica, curfew changes etc...it's been announced here almost immediately.