If unusual traffic conditions or excavation of a major artery requires that the excavation work be performed as emergency work, the city shall have full power to order, at the time the permit is granted, that a crew of men and adequate facilities be employed by the permittee 24 hours a day to the end that such excavation work may be completed as soon as possible. If emergency conditions create an immediate hazard to life or property, corrective procedures may be commenced without the securing of a permit as required by this article, provided such permit is secured at the earliest practicable time after commencement of the work.

Secs. 66-71--66-80. Reserved.