One of the chief duties of the Attorney General is to render legal opinions at the request of various state and local officials. The opinions are of two types, official and unofficial. Official opinions are rendered directly to the Governor or state department heads. The unofficial opinions are rendered to other state officers such as legislators or district attorneys, or to county and municipal legal officers. Each unofficial opinion is duly noted and is to be used for information only. These published reports are confined almost entirely to brief summaries of the opinions of the attorney general together with sets of tables and indexes, either incorporated into the appropriate volume or in separate volumes. In instances of the latter, the index and table volumes often cover a wider time span than do the opinion volumes. The tables usually consist of the various pages on which the various citations of constitutional and legal code provisions used in rendering the opinions appear. There is, of course, also a subject index. In volumes of the earlier years, a report of the attorney general to the Governor is also included.