Port services may be rendered directly by Spanish Port Authorities or indirectly by other bodies recognised under the laws governing Spanish ports. The rendering of such services requires the payment of certain tariffs: -           Port fees as payment for the private use or special exploitation of public domain territory in ports, and as payment for non-commercial services rendered by Port Authorities. -           Port tariffs as payment for commercial services rendered under systems of competitive pricing and having the character of private prices. -           Tariffs for basic services which have been allocated under licence by the Port Authority to third parties. -           Official terminal tariffs corresponding to operations of loading, unloading, stowage and unstowage and transshipment of goods from vessel to vessel and within the port zone. In addition, there are a series of discounts on fees that that port users have the right to enjoy. These discounts are stipulated under sections 19 and 27 of Act 48/2003 on the Economic Regulations and the Rendering of Services in ports of general interest.