(1) "Catastrophic public nuisance" means a condition on state or federal land where natural resources and biota have been managed or neglected to such an extent as to cause: (a) the threat of a catastrophic wildfire demonstrated by: (i) stand density, basal area, or ground fuel load greater than 150% of land health standards; or (ii) an insect or disease infestation severe enough to threaten the mortality of at least 20% of the trees in the area; or (b) a condition in the area that threatens the: (i) quantity or quality of the public water supply of a political subdivision; (ii) health, safety, or welfare of the citizens of a political subdivision; (iii) air quality of a nonattainment area; or (iv) vegetative resources required to support land health and authorized livestock grazing.

(a) the threat of a catastrophic wildfire demonstrated by: (i) stand density, basal area, or ground fuel load greater than 150% of land health standards; or (ii) an insect or disease infestation severe enough to threaten the mortality of at least 20% of the trees in the area; or

(i) stand density, basal area, or ground fuel load greater than 150% of land health standards; or

(ii) an insect or disease infestation severe enough to threaten the mortality of at least 20% of the trees in the area; or

(b) a condition in the area that threatens the: (i) quantity or quality of the public water supply of a political subdivision; (ii) health, safety, or welfare of the citizens of a political subdivision; (iii) air quality of a nonattainment area; or (iv) vegetative resources required to support land health and authorized livestock grazing.

(i) quantity or quality of the public water supply of a political subdivision;

(ii) health, safety, or welfare of the citizens of a political subdivision;

(iii) air quality of a nonattainment area; or

(iv) vegetative resources required to support land health and authorized livestock grazing.

(2) "Chief executive officer" means: (a) for a municipality: (i) the mayor, if the municipality is operating under a form of municipal government other than the council-manager form of government; or (ii) the city manager, if the municipality is operating under the council-manager form of government; (b) for a county: (i) the chair of the county commission, if the county is operating under the county commission or expanded county commission form of government; (ii) the county executive officer, if the county is operating under the county-executive form of government; or (iii) the county manager, if the county is operating under the council-manager form of government.

(a) for a municipality: (i) the mayor, if the municipality is operating under a form of municipal government other than the council-manager form of government; or (ii) the city manager, if the municipality is operating under the council-manager form of government;

(i) the mayor, if the municipality is operating under a form of municipal government other than the council-manager form of government; or

(ii) the city manager, if the municipality is operating under the council-manager form of government;

(b) for a county: (i) the chair of the county commission, if the county is operating under the county commission or expanded county commission form of government; (ii) the county executive officer, if the county is operating under the county-executive form of government; or (iii) the county manager, if the county is operating under the council-manager form of government.

(i) the chair of the county commission, if the county is operating under the county commission or expanded county commission form of government;

(ii) the county executive officer, if the county is operating under the county-executive form of government; or

(iii) the county manager, if the county is operating under the council-manager form of government.

(3) "County sheriff" means an individual: (a) elected to the office of county sheriff; and (b) who fulfills the duties described in Subsection 17-22-1.5(1).

(a) elected to the office of county sheriff; and

(b) who fulfills the duties described in Subsection 17-22-1.5(1).

(4) "Federal agency" means the: (a) United States Bureau of Land Management; (b) United States Forest Service; (c) United States Fish and Wildlife Service; or (d) National Park Service.

(a) United States Bureau of Land Management;

(b) United States Forest Service;

(c) United States Fish and Wildlife Service; or

(d) National Park Service.

(5) "Federally managed land" means land that is managed by a federal agency.

(6) "Political subdivision" means a municipality or county.