IANAL but in Roman Law countries - and just for the record - not necessarily applying to this case, there is the concept of contracts (or clauses in contracts)

IANAL but in Roman Law countries - and just for the record - not necessarily applying to this case, there is the concept of contracts (or clauses in contracts) that can be deemed nullum ab initio and Quod nullum ab initio nullum producit effectum if they are against or contrasting any Law, i.e. ipso jure.