HarnWorld has this level of detail:
Harbormaster: the officer in charge of the port appointed by the Mayor. He is either a retired member of the Pilots' Guild or a political apoointee who hires a master pilot as an assistant. Duties of a harbormaster include supervising port maintenance, providing pilotage services, and collecting martime taxes such as pilotage, wharfage, and vessel registration fees. Harbormasters have several assistants in the larger ports.
Bondmaster: the official responsible for the administration of the city bonding house, and the collection of hawking taxes and import duties. Appointed by the mayor, the bondmaster is usually a member of an important guild and may have assistants. Guards will be provided by the Warden.
Bonding Fees: the mercantyler can delay payment of the hawking tax by placing his goods in bond, thta is storing them in the government bonding house. Goods temporarily brought into a city, but destined to be exported, must be placed in bond. This service incurs payment of a bonding/storage fee, a percentage of decalred value, payable in advance with a minimum one month fee. The average Bonding Fee is 1% per month.
Martime Taxes: Shipowners berthed in a port must pay to the harbormaster, Wharfage that averages 1 d per foot of vessel length per day. Vessels at anchor in port pay roughly 20% of the wharfage rate. The Pilotage fee is typically 24-48d per vessel. A vessel can reduce its wharfage by 50% (not its pilotage) by paying an annual Registry fee.