If the applicant for the variation, revocation or extension of a family violence intervention order is not the protected person, the protected person's guardian, the respondent for the order or a police officer, the application may only be made with the written consent of—
(a) the protected person; or
(b) if the protected person is a child, a parent of the child other than the respondent; or
(c) if the protected person has a guardian, the guardian.