13.—(1) Without prejudice to the provisions of paragraph 12, but subject to sub-paragraph (2), a court of summary jurisdiction for the petty sessions district concerned may, on the application of the offender or the + responsible officer, by order amend a probation order—N.I.
(a)by cancelling any of the requirements of the order; or
(b)by inserting in the order (either in addition to or in substitution for any such requirement) any requirement which the court could include if it were then making the order.
(2) A court of summary jurisdiction shall not amend a probation order under sub-paragraph (1)—
(a)by reducing the probation period, or by extending that period beyond the end of 3 years from the date of the original order; or
(b)by inserting in it a requirement that the offender shall submit to treatment for his mental condition, or his dependency on drugs or alcohol, unless the amending order is made within 3 months after the date of the original order.
(3) In this paragraph and paragraph 14, references to the offender's dependency on drugs or alcohol include references to his propensity towards the misuse of drugs or alcohol.
14.—(1) Where the medical practitioner or other person by whom or under whose direction an offender is being treated for his mental condition, or his dependency on drugs or alcohol, in pursuance of any requirement of a probation order—N.I.
(a)is of the opinion mentioned in sub-paragraph (2); or
(b)is for any reason unwilling to continue to treat or direct the treatment of the offender,
he shall make a report in writing to that effect to the responsible officer and that officer shall apply under paragraph 13 to a court of summary jurisdiction for the petty sessions district concerned for the variation or cancellation of the requirement.
(2) The opinion referred to in sub-paragraph (1) is—
(a)that the treatment of the offender should be continued beyond the period specified in that behalf in the order;
(b)that the offender needs different treatment, being treatment of a kind to which he could be required to submit in pursuance of a probation order;
(c)that the offender is not susceptible to treatment; or
(d)that the offender does not require further treatment.