Chambers USA covers all the states in the USA. Law firms that have a national presence are also ranked in our Nationwide tables (which focus on those firms that are the country’s best in their respective areas of practice). Areas of Law In every state we rank the leading law firms in at least four areas of law: Corporate / Commercial, Labor & Employment, Litigation, and Real Estate. In most states we cover more than four areas of law, so that the guide overall covers 45 different practice areas on a state and national level. Rankings at state-level are based upon the location in which a firm or lawyer practices regardless of where the clients, deals, and cases take place. Law Firm Networks Chambers ranks leading law firm networks in the region. Date of Publication Chambers USA is published annually in May. The ranking tables and commentary, therefore, are fixed at the date of publication for the following 12 months. However, factual information, such as mergers or lawyer-moves, is kept up-to-date on the website throughout the year.