1The public organ shall ex officio investigate all facts and assess all circumstances necessary for the resolution of the case.
2The public organ shall determine independently the type, purpose, and extent of administrative investigation, and assess whether a fact or circumstance is necessary for the resolution of the case.
3Unless otherwise provide by law, the documents that certify acts, facts, qualities, or subjective situations, necessary for the conduct of an administrative investigation, shall be administered ex officio by the organ that conducts the administrative procedure, either in its own administration or other public bodies. The public organ may request from the party only the necessary elements for their identification.