La. Stat. tit. 41 § 637
Wherever any real property has been acquired by any association, organization or non-profit corporation by virtue of a deed which contains a stipulation that such property is to be used for educational purposes and thereafter the use of said property is abandoned to any school board and is used by such school board for such purposes for a period in excess of ten years, such stipulation, abandonment and use shall constitute a dedication of such property to the public for such purposes and the right to administer and use such property for educational purposes shall be in the school board which has exercised the use of such property; provided that the provisions of this Section shall not apply to any property owned by an agency of the state, municipality or other public body.
La. R.S. § 41:637