Civil Code (Cap. 16), article 462

462. (1) In order to acquire an easement by prescription, possession for a period of not less than thirty years is necessary. (2) If the servient tenement is subject to entail, or belongs to a church or any other pious institution, the prescriptive period is forty years. (3) In the cases referred to in this article, the person pleading prescription is not bound to produce a title, and no plea on the ground of bad faith can be set up against him. Prescription with regard to affirmative or negative easements.