The Bluebook requires that state codes be cited to the publication date of the volume containing the code section. What's the problem with this?
(1) LexisNexis and Westlaw don't give you the publication date of the volume.
(2) The Law Library doesn't subscribe to the codes of other states.
So how can you find the correct date to cite? Check the Hein Checklist of Statutes! Intended to be used by libraries to check that they have the current edition of a code volume, the Checklist of Statutes contains the current date of publication for each code volume (which can vary from volume to volume). This means that it can be used to find the correct date to cite in a Bluebook citation, even if you don't have the physical volume to check.
To look at the Hein Checklist of Statutes in print (KF2 .H44), ask at the Reference Desk.