No well drilled after January 1, 1954, shall be permitted to produce either oil or gas from different pools through the same string of casing without first receiving written permission from the board, which may require at the discretion of the board notice and hearing.
Mont. Admin. r. 36.22.1208
82-11-111, MCA; IMP, 82-11-123, 82-11-124, MCA;