47.20.—(1) This rule applies where one of the following wants the court to vary or discharge an order listed in rule 47.1(2)—
(a)an applicant;
(b)the respondent; or
(c)a person affected by the order.
(2) That applicant, respondent or person affected must—
(a)apply in writing as soon as practicable after becoming aware of the grounds for doing so;
(b)serve the application on—
(i)the court officer, and
(ii)the respondent, applicant, or any person known to be affected, as applicable;
(c)explain why it is appropriate for the order to be varied or discharged;
(d)propose the terms of any variation; and
(e)ask for a hearing, if one is wanted, and explain why it is needed.