"Attorneys general, the highest legal officers in government, are often asked by government agencies to interpret the meaning of statutes. When they do, it is often in the form of a written opinion. These attorney general opinions are not binding on the courts, but they have influence, especially when there is no precedent to the contrary. And they can be very helpful in deciphering an otherwise hopelessly complicated statute.
Attorney general opinions are collected in publications usually called something like 'Opinions of the Attorney General of the State of...' A separate set exists for each state and for the federal government." -From, "Legal Research: How To Find & Understand The Law" By: Elias & Levinkind