TICTOC...you pulled out only a portion of the information...the article starts with...
This advice has been reviewed and reissued with amendments to the Entry Requirements - Passport Validity section (reworded). The overall level of the advice has not changed; there are no travel restrictions in place in Jamaica.
And...here is the link to the full article for anyone that may be interested...it's very similar to other countries that provide travel safety information...
http://www.fco.gov.uk/en/travel-and-...merica/jamaica