The permit period shall not exceed two years. If circumstances have not materially changed, the permit may be renewed for like periods upon application to the Department and upon showing due compliance with the original permit and applicable laws and regulations. Renewal applications shall be submitted to the Department at least 90 days before the expiration of the permit.
Or. Admin. Code § 141-010-0240
Stat. Auth.: ORS 274
Stats. Implemented: ORS 274 .735