(1)Previous convictions shall not be laid before the presiding judge until the prosecutor moves for sentence, and in that event the prosecutor shall lay before the judge a copy of the notice referred to in subsection (2) or (4) of section 68 of this Act.
(2)On the conviction of the accused it shall be competent for the court to amend a notice of previous convictions so laid by deletion or alteration for the purpose of curing any error or defect therein:
Provided that no such amendment shall be made to the prejudice of the accused.
(3)Where any such intimation as is mentioned in section 68 of this Act is given by the accused, it shall be competent to prove any previous conviction included therein in the manner set forth in section 162 of this Act, and the provisions of the said section shall apply accordingly.
(4)Any conviction which is admitted in evidence by the court shall be entered in the record of the trial.
(5)Nothing in this section or in section 68 of this Act shall prevent evidence of previous convictions being led in any case where such evidence is competent in support of a substantive charge.