Government departments may establish development councils under various Acts of Parliament. These councils are empowered to impose levies on persons registered as carrying on a business within the industry or sector concerned - the levies being used for the general advancement of that industry. Departments themselves may also impose levies without establishing a development council. Such levies may be for the purpose of scientific research, promotion of export trade or other improvements within a particular industry, for example. In such cases, authority is normally given by way of Statutory Instrument.