Incorporation for weather modification; limitations as to area. Any designated area within a county bordering the Columbia River and having a population of less than 21,000, according to the latest federal decennial census, or within two or more of such counties, may be incorporated as a weather modification district for the purpose of

(1) Causing or attempting to cause by artificial means condensation or precipitation of rain, snow, hail, moisture or water in any form contained in the atmosphere; or

(2) Preventing or attempting to prevent by artificial means the natural condensation or precipitation of rain, snow, hail, moisture or water in any form contained in the atmosphere. [1969 c.698 §3]