Art. 29. Economic rights shall remain in force for: distribution of the work, including sale or other forms of transfer of the ownership
(I) the life of the author and 75 years after his death; where the work belongs to two or more co-authors, the 75 years shall be counted as from the death of the last co-author;
(II) seventy-five years following the disclosure:
(a) of posthumous works, where it occurs within the term of protection referred to under (I);
(b) of works made in the course of official duties performed on behalf of the Federation, federated bodies or municipalities.
"The protection referred to in this Chapter shall be for 50 years following the first fixation of the sounds on the phonogram."