1. If a Muqawala contract is concluded based on an agreed design in exchange for a lump-sum remuneration, the contractor may not claim any increase in the remuneration, even if the prices of the materials used in the work or the remunerations of the workers or other expenses have increased. 2. The contractor may not claim any increase in the remuneration if a modification or addition is made to the design, unless this is due to a fault attributable to the employer or is made by their authorization and they have agreed with the contractor on the increase in remuneration. 3. If the contractual equilibrium between the obligations of both the employer and the contractor is disrupted due to general exceptional circumstances that could not have been foreseen at the time of contracting, thereby undermining the basis upon which financial assessment of the Muqawala contract was founded, the court may, depending on the circumstances and after balancing the interests of both parties, order the restoration of the contractual equilibrium, including the extension of the execution period, the increase or reduction of the remuneration, or may order the rescission of the contract.
Interpretation and application must be checked against the official text and current version.