123. Express grant of support.

An easement of support for artificial structures may be the subject of an express grant or reservation. In the case of registered land, an express grant or reservation of such an easement must itself be registered even if the disposition in which it is made does not itself require to be registered1. The same object is sometimes attained, in dispositions of minerals2, by a covenant which binds the mineral owner or the lessee not to work a certain part or certain parts of a seam or vein, or by a covenant to leave specified pillars unworked for the support