While the contractor may be able to reap benefits from the tariff plan, some may have difficulty buying trades for adjusted rates, especially when these have lower turnover. If this is the case, a partnership is beneficial, as the mandated contractor will gain experience in working for the retailer in that specific environment. Conversely, a permanent cycle of appointing new contractors outside of a partnership agreement would result in variable costs for the work, volatility in the duration of the program and various exclusions on the risk profile of a given project. Partnership agreements include the PPC2000 Project Partnership Contract, the TPC2005 Partnership Contract, the NEC Partnership Contract and the addition of ICE Partnership. The partnership charter should require all team members to resolve disputes without claims or disputes.