For this reason I am of opinion that the Registrar-General has not shown that his notification on the appellant's certificate of title is one to which the retrospective operation of s. 88 (3) applies. But the fact that the instrument containing the restrictive covenant did not by its language annex the benefit of the restrictions to land retained by the covenantee is, in my opinion, by itself a reason for reaching the same conclusion, because s. 88 (3), as I would construe it, relates only to a restriction of the same description as that to which sub-s. (1) of the same section is directed, that is to say a restriction (as to the user of land) the benefit of which is intended to be annexed to other land. The sub-section links that class of restriction with easements, and provides that neither shall be enforceable against a person interested in the land claimed to be subject to it, not being a party to its creation, unless the instrument clearly indicates (a) the land to which the benefit of the easement or restriction is appurtenant; (b) the land which is subject to the burden of the easement or restriction; (c) the persons (if any) having the right to release, vary or modify the easement or restriction other than persons having, in the absence of agreement to the contrary, the right by law to do so; and (d) the persons (if any) whose consent to a release, variation or modification of the easement or restriction is stipulated for. The expression "is intended to be annexed to other land", as here used, is not satisfied, in my opinion, unless the instrument creating the restriction discloses an intention that by force of its own language the benefit of the restriction shall be annexed to other land. This excludes the case where annexation is not express but is the result of a building scheme. It excludes also the case where the benefit of a restriction is not annexed to other land and is merely made assignable with other land - excludes it even if the law is, as Mr. H. W. R. Wade maintains (1957) Cambridge Law Journal 146, notwithstanding the case of In re Pinewood Estate, Farnborough [1] , that an assignment of the benefit together with the other land brings about an annexation. Neither a natural reading of s. 88 as a whole nor the probabilities of the matter would lead one, I think, to understand sub-s. (3) as intending to refer by the expression "a restriction" to any different kind of restriction from that with which, up to that point, the section has been dealing. The form of the section tends against such a reading. A sudden change of subject matter in the middle, not only of a section, but of a sub-section, indeed of a sentence, is not likely to be intended. But that is not all. If the change of subject matter is intended, the contrast produced is remarkable. The first subject is a restriction of such a kind that its enforceability as a burden upon the subject land is ensured by the fact that both the general law and the section itself require a clear indication in the instrument itself of land to which the benefit is appurtenant. The other subject is a restriction of a kind for which case law has not yet definitely laid down that the land to be benefited must be defined by the instrument, and for which the section itself does not take upon itself to enact that requirement. Consider the result which s. 88 (3) would produce if its provisions were to extend to a restriction of this latter kind. In the case of a restriction enforceable only by virtue of the doctrine applying to building schemes, it would mean that the Registrar-General would be authorized to undertake the task - often a difficult enough task even for a court - of investigating the circumstances of the sale in which the restriction was created, and deciding whether the case is within the Elliston v. Reacher [1] doctrine; and he would be authorized to record his decision on the register as a statement of ascertained fact. In the case of a restriction which is assignable with the land benefited but is not annexed to that land, it would have further consequences sufficiently odd to give one pause. First, if the opinion of Upjohn J. be correct as to the identification of the dominant land from extrinsic evidence, the Registrar-General would be authorized to inquire and satisfy himself as to the identity of the land intended to be benefited in cases where the instrument itself does not supply the answer. Secondly, he would be authorized to inquire into the question whether the land benefited had been transferred without an assignment of the covenant since the creation of the restriction; for, if it had, the restriction would no longer exist as a burden on the subject land. Thirdly, he would be authorized to enter on the title to that land a notification that the restriction is a burden upon it, though the statement could not in truth be more than an expression of his opinion upon a possibly doubtful question. And, finally, the notification would stand thereafter as a continuing statement that the restriction is a burden on the land, notwithstanding that a transfer of the land benefited without an accompanying assignment of the covenant may at any moment bring the burden, if it exists, to an end, and no one would be able to tell at any given point of time whether it has come to an end unless he were to investigate transactions unconnected with the subject land and not necessarily to be discovered by search in the Lands Titles Office. It must be remembered that what s. 88 (3) authorizes is not a notification of the historical fact that a restrictive covenant has been entered into; it is a notification of the existence of a burden consisting of a restriction upon user; so that no notification of a covenant is within the authority unless it is, or amounts to, a statement that the covenant is currently effectual in law to subject the land to the burden of a restriction.