This method of operating is frequently encountered in the case of a terminal handling industrial bulk (ore or oil) and general cargoes (forest products or fruit). Under these circumstances, it is frequently the shipper, a group of several shippers, or the shipowner itself who serves as the operator of the terminal. This type of special purpose operation does not necessarily represent a public service, hence, it does not require systematic regulation by the port authority. Nevertheless, standards governing the maintenance of the facilities can be imposed for the preservation of the assets given in concession.