155 NAC 1-004 . At the earliest practicable moment following discovery, but no later than one hour after confirmed discovery of any reportable occurrence that happens on a regulated pipeline as defined in section 004.01-004.03C, an operator shall notify the State Fire Marshal Pipeline Safety Division. These occurrences include:

004. At the earliest practicable moment following discovery, but no later than one hour after confirmed discovery of any reportable occurrence that happens on a regulated pipeline as defined in section 004.01-004.03C, an operator shall notify the State Fire Marshal Pipeline Safety Division. These occurrences include:#

004.01An occurrence that results in a natural gas release due to over-pressure that exceeds the allowances of 192.201A, excavation damage, outside force damage, or natural force damage. Natural force damage includes but is not limited to: earth movement; earthquakes; lightning; flooding; high winds; tornado; or similar natural causes.#

004.02An occurrence that has or will interrupt natural gas service to 50 or more customers. This does not include scheduled or planned maintenance.#

004.03An occurrence related to a natural gas release that results in the evacuation of:#

004.03AFour or more one or two family dwellings; or#

004.03BOne or more multifamily dwellings; or#

004.03CAny evacuation of a business, public building or public gathering.#

004.04An occurrence that is significant in the judgment of the operator that could affect the daily operations of the pipeline, safety of the public or operator personnel, even though it does not meet the criteria of 004.01-004.03C.#