(a) Drilling units.
(1) After one discovery deep well has been drilled establishing a pool, an application to establish drilling units may be filed with the commission by the operator of such discovery deep well or by the operator of any lands directly and immediately affected by the drilling of such discovery deep well, or subsequent deep wells in said pool. Each application shall contain such information as prescribed by reasonable rules proposed by the commission in accordance with the provisions of section five of this article.