Permitting regulations in this category address the internal spacing between wind turbines in a given project. There may be a variety of reasons for this type of regulation including ensuring one turbine will not damage another if it malfunctions, or to mitigate impacts on migratory birds and bats. Many developers will already include such internal spacing in their project plans to ensure that each turbine has sufficient wind resource availability since there are significant costs and considerations with decommissioning a project if it is unsuccessful.