Where the work has not been published or made available from the time it was produced, the economic rights shall be protected for seventy (70) years from the calendar year of such production. Article 38: The economic rights in a work of applied art shall be protected until the 30-year period from the date of the production of this work lapses. Article 39: Economic rights which belong to the State administrations shall last ten years from the date of the disclosure of the work irrespective of its form. After the period has lapsed, the author shall fully recover the exercise of the economic and moral rights in the work. Article 40: The right of training establishments to take a share of the proceeds from the exploitation of the works created within the establishment shall last five (5) years from the date of publication of such works. After the period has lapsed, the author shall fully recover the exercise of his economic rights. Article 41: The periods provided for in this Chapter shall lapse at the end of the calendar year during which they normally expire. CHAPTER VII –ASSIGNMENT OF RIGHTS AND LICENSES Section I – General principles Article 42: A copyright assignment contract and license agreement for exploitation shall be concluded in writing on pain of being declared void. This shall also apply to authorizations for use free of charge. The full assignment of rights in future works shall be null and void. Article 43: The assignment of economic rights and licenses to carry out acts covered by economic rights may be limited to certain specific rights, as well as in relation to the aims, duration, territorial scope and extent or means of exploitation. Failure to mention the territorial scope covered by the assignment of economic rights or the license granted to carry out acts set out in the economic rights shall be considered to limit the assignment or license to the country in which the assignment or license is granted. Failure to mention the scope or means of exploitation covered by the assignment of economic rights or the license granted to carry out acts set out in the economic rights shall be considered