The bill aims to revise sanitation laws related to subdivisions by prohibiting local boards of health from adopting regulations that would permit a mixing zone to encroach on adjacent properties. It clarifies that the Sanitation in Subdivisions Act does not apply to certain drainfield mixing zones. Additionally, the bill amends existing definitions and provisions in Sections 50-2-116 and 76-4-102 of the Montana Code Annotated (MCA) to reflect these changes.

Key amendments include the insertion of language that prohibits the construction of subsurface wastewater treatment systems on parcels created after March 30, 2011, if the associated mixing zone would encroach onto adjacent property. The bill also revises the definition of "proposed drainfield mixing zone" to specify that it applies to parcels created after the same date, while excluding mixing zones approved before March 30, 2011, or under Title 50, chapter 2, part 1, before October 1, 2025. These changes are intended to enhance public health protections and clarify the regulatory framework surrounding sanitation in subdivisions.

Statutes affected:
LC Text: 50-2-116, 76-4-102
HB0180_1(1): 50-2-116, 76-4-102
HB0180_1(10): 50-2-116, 76-4-102
HB0180_1(2): 50-2-116, 76-4-102
HB0180_1(3): 50-2-116, 76-4-102
HB0180_1(4): 50-2-116, 76-4-102
HB0180_1(5): 50-2-116, 76-4-102
HB0180_1(6): 50-2-116, 76-4-102
HB0180_1(7): 50-2-116, 76-4-102
HB0180_1(8): 50-2-116, 76-4-102
HB0180_1(9): 50-2-116, 76-4-102
HB0180_1: 50-2-116, 76-4-102
HB0180_2(1): 50-2-116, 76-4-102
HB0180_2(10): 50-2-116, 76-4-102
HB0180_2(11): 50-2-116, 76-4-102
HB0180_2(2): 50-2-116, 76-4-102
HB0180_2(3): 50-2-116, 76-4-102
HB0180_2(4): 50-2-116, 76-4-102
HB0180_2(5): 50-2-116, 76-4-102
HB0180_2(6): 50-2-116, 76-4-102
HB0180_2(7): 50-2-116, 76-4-102
HB0180_2(8): 50-2-116, 76-4-102
HB0180_2(9): 50-2-116, 76-4-102
HB0180_2: 50-2-116, 76-4-102
HB0180_X(1): 50-2-116, 76-4-102
HB0180_X(2): 50-2-116, 76-4-102
HB0180_X: 50-2-116, 76-4-102