Fernando Ariel López writes  [es] for Infotecarios about Law 26899: Creating Digital Institutional Repositories of Open, Owned, or Shared Access  [es], also known as the Open Access Law , approved in Argentina in November 2013, after a long process initiated in 2009.
The scientific-technological production resulting from the work, training, and/or projects funded wholly or partially by the public funds from its researchers, technologists, faculty, post-doctoral fellows, and masters and doctoral students should be shared in free and open access.
Later, Fernando quotes Jorge Atrio from the REDES Center:
Some big publishers might perceive the initiative as a threat to their interests, but progress on free access to scientific information should generate a consensus and different types of institutional re-engineering.
Finally he includes an analysis of how true to “open access” the law is:
According to the analysis  [es] and variables that the Board and policy estimators are considering in favor of open access to the MELIBEA scientific production, the Open Access law in Argentina is 84.47% OA.
Other articles by Fernando Ariel López in Infotecarios that make a “brief” introduction to the open access to knowledge movement:
Una guerra de ciencia ¿ficción?: monopolios editoriales vs. acceso abierto  [es]
Un Bien Público sin precedente = vieja tradición y nueva tecnología  [es]
Verde, que te quiero verde… acceso abierto  [es]