(1) Whenever a rule in this subchapter imposes a time limit within which an action must be performed, and further provides that such time limit may be extended by the state veterinarian for good cause shown, "good cause shown" shall include but not be limited to:
(a) acts of God, including severe weather conditions, inaccessibility of livestock due to floods, etc.;
(b) unavailability of livestock due to summer pasturage in inaccessible areas;
(c) the peak calving period for the owner directed to comply with a departmental order; or
(d) personal hardship to the owner created by death, serious illness, or serious accident in his family.
(2) When the state veterinarian receives a request for an extension of a time limit imposed under this subchapter, he shall investigate the claim that good cause for the time extension exists, and upon a finding that such good cause does exist and that no other livestock operator will suffer significant harm as a result of the time extension for a period not to exceed 60 days.