(1) If a party files a notice and statement under rule 1852 (Costs—procedure for reconsideration), the registrar must—
(a) reconsider a decision objected to having regard to the statement of objection and any reply filed under rule 1853; and
(b) give reasons for the decision on reconsideration; and
(c) issue a certificate of assessment in accordance with the decision on reconsideration.
(2) Subject to rule 1855, a certificate of assessment issued under subrule (1) (c) is final.