California Code, Public Utilities Code - PUC § 99270.2

If an operator serves an area that was first designated as an urbanized area in the 1980 or a subsequent federal census, the transportation planning agency or the county transportation commission may grant the operator time, but not more than five years from July 1 of the year following the year of the census, to meet the ratio of fare revenues to operating cost required of an operator serving an urbanized area.