Except as otherwise provided in NRS 271.475:
1. When expressly authorized by a provision of this chapter and the conditions of paragraph (a) or (b), or both, of subsection 2 of NRS 271.306 are satisfied, an ordinance required by this chapter may be adopted or amended as if an emergency existed.
2. The governing body’s declaration, if any, in any ordinance that it is such an ordinance is conclusive in the absence of fraud or gross abuse of discretion.
3. Such an ordinance may become effective at any time when an emergency ordinance of the municipality may go into effect.
4. Such an ordinance may be adopted by an affirmative vote of not less than two-thirds of all the voting members of the governing body, excluding from any such computation any vacancy on the governing body and any member thereon who may vote only to break a tie vote.