The IET Regulations are not statutory, but are based on the statutory acts and internationally agreed codes of safety. They lay down recommendations for the safe installation and use of electrical equipment in buildings, and are therefore of great importance to members of the electrical contracting industry. Codes of Practice are issued by the British Standards Institution and recommend standards of good practice. The majority of electricians are employed by a contracting firm and therefore are not likely to become involved with the administrative side of the business. However, it is important that the electrician is aware of the procedures involved in obtaining the work he or she is to carry out. In the case of a large site, a contracting firm may well have a site hut erected for the storing of materials; for smaller contracts, equipment would be stored at base and transported as required.