It is the same across all industries–there are laws, guides and legislations. This is how it is like in the marketing sector. There are general laws, and there are laws specific only to the industry. Knowing these rules, laws and guidelines, through the references available in guides, libraries and the internet is an important aspect for the businessman in running his or her business, while for the individual employee or marketer in keeping abreast of the laws and his or her rights.