Code of Organization and Civil Procedure (Cap. 12), article 748

748. The value of the thing in issue is determined by the demand- (a) when the demand is for the payment of a fixed sum; (b) when the demand is for a thing the value of which is determined in the title which gives cause to the action, or in any other writing binding upon the parties, or by common repute, or by the market price. Determination of value of immovable property,