4. If an application for recalculation is made by only one parent, SARPA may, as part of its examination, require the other parent to provide the information and documents needed for the recalculation that are determined by government regulation.
If the context so requires, SARPA notifies its request for information or documents to the parent by any means that provides proof of sending. The notification may be made by regular mail; in that case, the date of sending is the date on which the request is mailed.