Cargo Separations and Tallying: (Clauses 13 & 16). Where a vessel is to carry various parcels of cargo, it may not be possible for all separations between the individual parcels to be ‘natural’ – i.e. separated by bulkheads and/or, in the case of tweendeckers, by tweendecks. The parties may need to agree between themselves on how parcels loaded in the same compartment are to be separated – e.g. by polyethylene sheeting or by tarpaulins – and on who is to supply and pay for this facility. The tallying (checking) of cargo as it is loaded or discharged is frequently an expensive operation and, if not carried out conscientiously, substantial cargo claims can arise for alleged short delivery, bad condition, etc. It is essential that some provision as to who is responsible at least for payment of tally clerks be entered in a charterparty covering the loading of bagged or similar cargo. Dues and Taxes: (Clause 20). This clause specifies which party to the contract is responsible for taxes which may be levied against the vessel and/or her cargo and/or the freight. Port Agents: (Clause 21). In any charterparty it is advisable that reference be made as to which of the parties is responsible for the selection of an agent. It is important to remember that the agent remains the servant of the shipowner, and the shipowner remains responsible for paying the port costs and the agency fee. Nevertheless, the appointment of an efficient agent is also important to a charterer, who will need to feel secure in the knowledge that proper liaison is being maintained between the agent and, say, a cargo shipper. Consequently it is often the case that charterers specifically negotiate that they have the right to nominate the port agents that will be appointed by the shipowner.