Section 654.4 - Definitions(a)Assistant Secretary shall mean Assistant Secretary for Employment and Training, U.S. Department of Labor.(b)Civil jurisdiction shall mean:(1) Cities of 25,000 or more population on the basis of the most recently available Bureau of the Census estimates; or(2) Towns and townships in the States of New Jersey, New York, Michigan, and Pennsylvania of 25,000 or more population and which possess powers and functions similar to cities; or(3) All counties, except those counties which contain any of the types of political jurisdictions defined in paragraphs (b) (1) and (2) of this section; or(4) All other counties are defined as "balance of county" (i.e., total county less component cities and townships identified in paragraphs (b) (1) and (2) of this section); or(5) County equivalents which are towns in the States of Massachusetts, Rhode Island and Connecticut.(c)Labor surplus area shall mean a civil jurisdiction that, in accordance with the criteria specified in § 654.5 , has been classified as a labor surplus area.(d)Reference period shall mean the two year period ending December 31 of the year prior to the October 1 annual date of eligibility determination.44 FR 1689, Jan. 5, 1979, as amended at 44 FR 26071, May 5, 1979; 48 FR 15616, Apr. 12, 1983; 53 FR 23347, June 21, 1988