Civil Code (Cap. 16), article 973

973. Persons capable of contractin g may not set up the nullity of the contract on the ground of the disability of those with w hom they have contracted. OF CONSENT Consent. 974. Where consent has been given by error, or extorted by violence or procured by fraud, it shall not be valid. CIVIL CODE [CAP. 16. 231 Error of law.975. An error of law shall not voi d the contract unless it was the sole or principal inducement thereof. Error of fact.976. (1) An error of fact shall not void the contract unless it affects the substance itself of t he thing which is the subject- matter of the agreement. (2) The agreement shall not be void if the error relates solely to the person with whom the agreem ent has been made, unless the consideration of the person has been the principal inducement thereof. Violence.977. (1) The use of violence against the obligor is a cause of nullity, even if such violence is practised by a person other t han the obligee. (2) Nevertheless, an obligation entered into in favour of a person not being an accessory to the use of violence, in consideration of services rendere d for freeing the obligor from violence practised by a third party, may not be avoided on the ground of such violence; saving the reduction of the sum or thing promised, where such sum or thing is excessive. When consent is considered extorted by violence.