Classification codes are a very broad way that articles are tagged in Business Scholarly & Trade (formerly ABI/INFORM). For instance, there are over 12,000 articles tagged with 4310 for Regulation in just the years 2009 & 2010.
It can be useful to do a search that combines a classification code (or codes) with keywords or subject terms.
compensation AND CC(43??)
This finds articles with the keyword compensation that are also tagged as related to 4300 Law (4310 Regulation or 4320 Legislation or 4330 Litigation)
(The ? marks are wildcards.)
To take a very broad sweep at finding legal issues related to HR, you can combine the overall classification code for Human Resource functions (6000 codes) with the overall classification code for law:
CC(43??) AND CC(6???)