25.—(1) Sections 11 and 12 of the Act of 1958 are hereby amended by the substitution in subsection (2) of each section of “three months” for “fifteen years”.
(2) Subsection (1) of this section shall not have effect in relation to a case where a valid notice under subsection (1) of the said section 11 or the said section 12, as the case may be, was served before the commencement of this Act.
