4. After rule 91, the following rule shall be inserted—
91A.—(1) Subject to paragraphs (2) and (3), where a standard form of restriction is to affect part only of the registered estate, then, where it refers to a disposition, or to a disposition of a specified type, to which it applies, that reference may be followed by the words “of the part of the registered estate” together with a sufficient description, by reference to a plan or otherwise, to identify clearly the part so affected.
(2) The words incorporated pursuant to paragraph (1) shall be in place of the words “of the registered estate” where those latter words appear in a standard form of restriction and are referring to a disposition, or to a disposition of a specified type, to which the restriction applies.
(3) The registrar may alter the words of any restriction affecting part of the registered estate only that he intends to enter in the register so that such part is described by reference to the relevant title plan or in another appropriate way.
(4) A restriction in Form L, M, N, O, P, S or T may commence with the word “Until . . . ” followed by a calendar date.”.