Article 45

in the above mentioned cases it is only permissible for the right of exploitation to be granted to a person or persons who were alive at the time of creation of the said right , but it is also possible for the right of exploitation to follow on in succession for persons who were not alive at the time of the conclusion of the contract, and as long as the owners of the right of exploitation are alive it shall be valid; and after their decease it shall lapse.