Whenever conditions inside or under unoccupied business buildings provide extensive harborage for rats (in the opinion of the director of health) the director of health is empowered to require compliance with the provisions of section 9.32.170 of this chapter, or its successor section, and, in the event that such conditions are not corrected within a period of sixty (60) days, or within the time to which a written extension may have been granted by the director of health, the director of health is empowered to institute condemnation and destruction proceedings. (Prior code § 18-22-8)