Books in this subject area deal with professional licensing
: the granting of a license, which gives a 'permission to practice.' Such licenses are usually issued in order to regulate some activity that is deemed to be dangerous or which involves a high level of specialized skill. The danger and skill elements inspire governments not to allow a free-for-all, but to regulate the activity, and licensing is a well-established and convenient method of regulation. Obtaining a license often involves accredited training and examinations, but this varies a great deal for different activities and countries.