Which of the following is NOT a requirement for subdivisions creating lots under 160 acres?

In Montana, when dealing with subdivisions that create lots under 160 acres, building permits are generally not a requirement for the subdivision process itself. Instead, building permits are associated with the actual construction of buildings on those lots rather than the subdivision of land.

The process for creating subdivisions primarily focuses on aspects related to the division of land, which includes ensuring proper planning, surveying, and environmental considerations. An environmental assessment evaluates the potential impacts of the subdivision on the surrounding environment, a plat map provides a graphical representation of the subdivision layout, and a survey establishes the precise boundaries of the new lots.

While building permits are necessary for undertaking construction, they fall outside the specific requirements for subdividing the land. Therefore, among the options provided, the correct answer highlights building permits as an item that is not a prerequisite in the subdivision process for lots under 160 acres.