(a) A certificate of limited partnership is amended by filing a certificate of amendment thereto in the office of the Secretary of State. The certificate must set forth:

(1) The name of the limited partnership;

(2) The date of filing of the certificate of limited partnership;

(3) The amendment to the certificate; and

(4) If the amendment is to become effective later than the time of filing, the effective date, or effective time and date, which may not be later than 90 days after the filing date of the amendment.

(b) A certificate of limited partnership may be amended at any time for any proper purpose the general partners determine.