Section 26 of the Principal Act is amended -

(a) in subsection (1), by deleting "not less than 3 months",

(b) in subsection (2), by substituting "within 40 days from the date of the issue of the notice to him or her, if he or she is dissatisfied with the value proposed to be stated, or any other material particular stated," for "within 28 days from the date of the issue of the notice to him or her, if he or she is dissatisfied with any material particular stated", and

(c) by substituting for subsection (3) the following:

"(3) Without prejudice to subsections (4) to (6), the valuation manager referred to in subsection (1) may

(a) having considered or caused to be considered any representations made to him or her by an occupier under and in accordance with subsection (2), or

(b) in the absence of any such representations, of his or her own volition,

if he or she thinks it appropriate to do so, cause the terms of the valuation certificate referred to in subsection (1) to be amended.

(4) Notwithstanding anything in the preceding subsections and, in particular the fact (if such be the case) that the powers under subsection (3) have been exercised in relation to the certificate referred to in subsection (1), the valuation manager referred to in subsection (1) may where, in his or her opinion, it is necessary or expedient to do so, cause that certificate to be replaced with a new proposed certificate.