Rule 4.12.740 - REQUEST FOR VARIANCE(1) A person who owns or is in control of anhydrous ammonia facility may apply in writing to the Montana department of agriculture for a temporary or permanent variance from any requirement of the rules. The application for a variance shall include such information and data as requested by the Montana department of agriculture.NEW, 1986 MAR p. 1820, Eff. 10/31/86.Sec. 80-10-503, MCA; IMP, Sec. 80-10-503, MCA;