DXCC Political Entities criteria 1c states: The Entity contains a permanent population, is administered by a local government, and is located at least 800 km from its parent. To satisfy the "permanent population" and "administered by a local government" criteria of this sub-section, an Entity must be listed on either (a) the U.S. Department of State's list of "Dependencies and Areas of Special Sovereignty" as having a local "Administrative Center," or (b) the United Nations list of "Non-Self-Governing Territories." St. Barts clearly meets that criteria and should be added to the DXCC list as a new counter.
Here is the info you will want to input into your logging software.
Prefix FJ
Country Name Saint Barthelemy
CQ Zone 8
Start date Probably February 22, 2007
QSL Bureau Yes (REF France)
UTC Offset 4 hours behind UTC
IOTA NA-146
ITU Zone 11
Continent North America
Longitude 62.83 West
Latitude 17.92 North
Other islands that will count for Saint Barthelemy Chevreau, Coco, Fourchue, Fregate, La Tortue, Le Boulanger, Pain de Sucre, Pele and Toc Vers.