170.This section makes it clear, for the avoidance of doubt, that a real burden created in a feudal grant is implied to be for the benefit of the superiority only, and not for the benefit of land in the vicinity which the superior also happens to own. Such land could be made into a benefited property only by the operation of section 18 (reallotment of real burden by nomination of new dominant tenement), section 19 (reallotment of real burden by agreement) and section 20 (reallotment of real burden by order of Lands Tribunal).
Explanatory Notes Commentary on Sections Part 4: Real Burdens Section 48: No implication as to dominant tenement where real  burden created in grant in feu