.Subject to the provisions of section 8, a servient owner may impose on the servient heritage any easement that does not lessen the utility of the existing easement. But he cannot, without the consent of the dominant owner, impose an easement on the servient heritage which would lessen such utility.

Illustrations

(a) A has, in respect of his mill, a right to the uninterrupted flow thereto, from sunrise to noon, of the water of Bs stream. B may grant to C the right to divert the water of the stream from noon to sunset:

(b) A has, in respect of his house, a right of way over Bs land. B may grant to C, as the owner of a neighbouring farm,