during the preceding year or on average during the preceding 3 years, as determined by the Secretary. (E) The area is among the 10 percent of counties nationally which have experienced the largest increases in unemployment and the largest decreases in manufacturing over the preceding 3 years, as determined by the Secretary. (3) Energy-transitioning communities For purposes of paragraph (2)(A)— (A) In general The term energy-transitioning communities means those nominated areas where the Secretary of Labor, in consultation with the Secretary of Energy, determines there is a high concentration of jobs in industries or at facilities directly affected by an energy source transition. (B) Energy source transition For purposes of subparagraph (A), the term energy source transition means— (i) a situation in which the occurrence of a shift from the use of a type of fossil fuel to use of other sources of energy is followed by the closing of a facility, or layoff of employees at a facility, that mines, extracts, produces, processes, or utilizes fossil fuels to generate electricity, and (ii) another situation as determined by the Secretary of Labor, in consultation with the Secretary of Energy, which is indicative of new demands or burdens on affected employees or employees in affected industries due to a significant change in the source of energy used by the facility or industry involved. (4) Eligibility criteria A nominated area shall be eligible for designation under this subsection only if it meets the requirements of section 1392(a)(1) and subparagraphs (A), (B), and (C) of section 1392(a)(3). (c) Period for which designation is in effect Any designation of an area as a community economic assistance zone shall remain in effect during the period beginning on January 1, 2017, and ending on the date that is 5 years after the latest designation of such area as a community economic assistance zone. (d) Limitation relating to State population An area shall not be designated as a community economic assistance zone under