33.—(1) Unless one or other of the cases mentioned in section 32(1) applies in respect of the assessment concerned, the assessment shall, subject to subsection (3) and section 35, become binding on—

(a) the claimant, and

(b) the respondent or, as the case may be and subject to section 34, each of the respondents,

on the expiry of the following period.

(2) That period is the period specified in the notice mentioned in section 30(2)(a) that was served on the claimant.

(3) The assessment shall not be binding on a person who proves that, at the time of his or her acceptance, or deemed acceptance, in accordance with this Part, of the assessment he or she was not of sound mind.

(4) Subsection (3) does not apply if—

(a) in the case of a claimant, a next friend or a committee of the claimant is acting on his or her behalf, and

(b) in the case of a respondent, a guardian or a committee of the respondent is acting on his or her behalf.