(a) Where there are two (2) or more county sites, the tax books shall be kept at one (1) site part of the time and at the other site part of the time, the time to be divided between the two (2) or more sites as in the judgment of the county collector will be proper.
(b) Where there are two (2) or more sites, the notices shall state the dates between which the county collector will be at each county site.