ORS 558.030: Artificial weather modification prohibited without license.

No person, without securing a license from the State Department of Agriculture, shall cause or attempt to cause by artificial means condensation or precipitation of rain, snow, hail, moisture or water in any form contained in the atmosphere, or shall prevent or attempt to prevent by artificial means the natural condensation or precipitation of rain, snow, hail, moisture or water in any form contained in the atmosphere. [1953 c.654 §3]