2 rules for unincorporated Yellowstone County, Montana.
Verified from official government sources
Yellowstone County has no dark-sky or outdoor-lighting ordinance for unincorporated land. County zoning near Billings limits glare that spills off a property (for example, home occupations may not create glare), but there is no shielding or lumen standard. Rural unzoned land sets no county rule.
Yellowstone County has no numeric light-trespass standard. In the zoning area, off-site glare can be limited (a home occupation may create none off-site) and nuisance law applies, but there is no county footcandle limit at the property line. Rural unzoned land sets no rule.
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