Civil Code (Cap. 16), article 469

469. (1) Continuous non-apparent easements, and discontin- uous easements, whether apparent or non-apparent, can only be created by a title; they cannot be created by prescription or b y the disposition of the owner of two tenements. (2) Nevertheless, the easement of right of way for the use of a tenement may be acquired by the prescription of thirty years, i f such tenement has no other outlet to the public road; and any o ther easement which, on the 11th February, 1870, was already acquire d under previous laws, m ay not be impeached. § II. O F THE MANNER IN WHICH EASEMENTS ARE EXERCISED Principal easement to include secondary easements.