CHAPTER VI PORT REVENUES IN return for the services detailed in the two previous chapters, and in order to defray the considerable outlay involved in maintaining an adequate establishment of officials with clerical and labouring staffs, and all the paraphernalia of appliances and gear required for the various operations, as well as in meeting the interest and overhead charges on their capital outlay, port authorities have to rely on certain sources of revenue in the form of rates, dues and charges, which in the majority of cases— more particularly rates and dues—have statutory force. A distinction may, in fact, be made in regard to charges, as being more of the nature of ad valorem payment for services rendered, rather than of proportionate levies, as in the case of rates and dues. RATES AND DUES Rates and dues are charged in respect of the cost of providing and maintaining (a) channel buoying and light- ing ; (b) pilotage services ; (¢) harbourage accommodation, and (d) quay berthage. In the first two cases, the levy is on the vessel ; in the third and fourth, it is both on the vessel and on the goods which it conveys. Light Dues. The Channel Lighting charge is termed a Light Due, and is levied by the lighthouse authority, which may or may not be the port authority. The scale of payment is specified in the schedule at the end of the Merchant Shipping (Mercantile Marine Fund) Act of 1898, but dues for local lights may be fixed by Order in Council on the application of local authorities. Other Light Dues are payable to the Collector of Customs at a port on behalf of Trinity House, the chief lighting authority. Vessels 6— (6010) 73