Section 13
SEC. 13. Libraries, public archives and museums have the right, subject to the conditions specified in the succeeding paragraphs, to produce for purposes of their activities, by photographic means, and without the consent of the creator or proprietor, copies of a literary or artistic work. Material forming part of the collections mentioned in the preceding paragraph which, by reason of their fragile character or rarity, cannot be lent to users in its original form, may be reproduced by photography for the purpose of loans. Nevertheless, except in cases where special reasons justify it, not more than two copies may be made. It is equally permissible to make, by means of photography, reproductions of isolated articles contained in composite works, as well as brief portions of other published works, in order to supply them, when this is considered expedient, to persons requesting their loan for purposes of research or study, instead of lending the volumes or booklets which contain them. Each person seeking loan may only receive one copy of each article or each portion of a work. When a copy of a work is found to be incomplete) the missing portions may be reproduced by means of photography, provided they only constitute a minor portion of the total work. Nevertheless, it shall not be permitted to produce a volume of a work published in several volumes or to produce missing tomes or parts of magazines or similar works, unless the volume, tome or part is out of stock with booksellers, the printing house and the publisher. Every library which, by law, is entitled to receive one or two copies of a printed work shall be entitled, when special reasons so require, to reproduce, by means of photography or process analogous to photography, a copy of a published work, the acquisition of which is considered necessary for the collections of the library, but which is out of stock with booksellers, the printing house and the publisher. A work belonging to the collections mentioned in the first paragraph of this section which has not been disseminated may not be reproduced or published without the consent of the creator or proprietor. However, such work may be reproduced for purposes of preservation.