The contractees and contractors should sign land use contracts to define each other’s rights and obligations.

发包方和承包方应当订立承包合同，约定双方的权利和义务。

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Contract awarding units and contractors should fully fulfill their contractual obligations. Failure to fulfill contractual obligations is subject to contract-breach responsibilities under the laws.

发包单位和承包单位应当全面履行合同约定的义务。不按照合同约定履行义务的，依法承担违约责任。

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Article 15 contract awarding units and contractors for construction projects shall conclude written covenants, specifying the rights and obligations of each party.

第十五条建筑工程的发包单位与承包单位应当依法订立书面合同，明确双方的权利和义务。

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But the report concludes that U.S. government agencies haven't provided unified guidance to contractors about their tax obligations, allowing the Afghan government to "exploit the inconsistencies" by seeking revenue from contractors, driving up the costs that are often eventually borne by American taxpayers.

WSJ: Kabul's Tax Levies Raise Flags From U.S. Watchdog

Among the report's recommendations were to exclude any Huawei or ZTE equipment or component parts from being used by government contractors, as well both companies becoming "more transparent and responsive to US legal obligations".

BBC: Huawei and ZTE pose security threat, warns US panel