1. No person may engage in business in this state as a well installation contractor unless he has obtained from the division a permit to conduct such business or businesses.
2. Nothing in sections 256.600 to 256.640 shall prevent a person who has not obtained a permit pursuant to sections 256.600 to 256.640 from constructing a well on his own or leased property intended for use only in a single-family house which is his permanent residence, or intended for use only for farming purposes on his farm, and where the waters to be produced are not intended for use by the public or in any residence other than his own. Such person shall comply with all rules and regulations as to construction of wells adopted under sections 256.600 to 256.640.
3. Any well installation contractor or pump installation contractor acting as the primary contractor in the construction, alteration, major repair or abandonment of any well shall be required to obtain a permit from the division and comply with all rules and regulations promulgated pursuant to sections 256.600 to 256.640.
4. Any heat pump installation contractor or monitoring well installation contractor shall obtain a permit from the division and comply with all rules and regulations pursuant to sections 256.600 to 256.640.