The principle of good faith drives forward the interpretation of provisions of international investment treaties. While the tribunal must interpret the treaty in good faith, the parties – as well as the tribunal – are also obliged to fulfil their treaty and contractual obligations in good faith. This creates a complex interplay of interpreting customary international law in the form of behavioural obligations. During this period of reconsideration of the system, these interpretative and behavioural aspects of the principle of good faith may provide an opening to a more cohesive system of investment protection. The following contribution approaches the tribunals’ power to interpret the good faith behavioural obligations of parties and considers its future value.

诚信原则推动国际投资条约条款的解释。法庭必须真诚地解释条约，但当事方以及法庭也有义务真诚地履行其条约和合同义务。这造成了行为义务形式的解释习惯国际法的复杂相互作用。在这个系统的重新考虑期间，诚实信用原则的这些解释和行为方面可能会为更具凝聚力的投资保护体系提供一个机会。以下贡献接近法庭的权力，以解释当事人的诚信行为义务并考虑其未来价值。