1. If any provision of this law or the applicability thereof to any person or circumstance is held invalid, the remainder of this law and the application of such provision to other persons or circumstances shall not be affected thereby.
2. Nothing in this law shall be construed as affecting in any way the right of any person to enforce or protect, under applicable law, his interest in water resources affected by a surface coal mining operation.
3. The operator of a surface coal mine shall replace the water supply of an owner of interest in real property who obtains all or part of his supply of water for domestic, agricultural, industrial, or other legitimate use from an underground or surface source where such supply has been affected by contamination, diminution, or interruption proximately resulting from such surface coal mine operation.
4. In accordance with this law, the commission shall promulgate regulations requiring the training, examination, and certification of persons engaging in or directly responsible for blasting or use of explosives in surface coal mining operations.