yes, in that context “kind” = reference type.
and the generation of the bibliographic entry for any of your cites of that reference type would be handled by the matching (or creation) of a bibliographic template for that reference type in the output style (bluebook).
As long as there are not other records defined as “statute” that would be affected by the changes, editing that template is a viable option.
Alternatively if no matching template is present, the default “generic” template will be applied.
You can also creat a new Reference Type and create an associated bibliographic template if you like.
Lots of details on how to edit output styles or creating reference types is available in the manuals listed here: http://community.thomsonreuters.com/t5/EndNote-Styles-Filters-and/EndNote-X7-Style-Editing-Guide-now-available-for-download/m-p/136811#M13977