; an increased public investment in research and development, infrastructure, energy, education, public services and the environment, and other essential goods and services. (b) Purpose It is the purpose of the Humphrey-Hawkins 21st Century Full Employment and Training Act of 2015 to fulfill the right to useful work at living wages for all persons seeking employment by establishing a Full Employment Trust Fund to fund and operate a national program of public service employment and to provide additional labor market opportunities to complement those offered by the existing private, public, and nonprofit sectors. 3. Definitions In this Act the following definitions apply: (1) Indian tribe The term Indian tribe has the meaning given such term in section 102(17) of the Housing and Community Development Act ( 42 U.S.C. 5302(17) ). (2) Secretary The term Secretary means the Secretary of Labor. (3) Small business The term small business has the meaning given the term small business concern under section 3 of the Small Business Act ( 15 U.S.C. 632 ). (4) State The term State has the meaning given such term in section 102(2) of the Housing and Community Development Act ( 42 U.S.C. 5302(2) ). (5) Trust fund The term Trust Fund refers to the Full Employment Trust Fund established under section 4. (6) Unit of general local government The term unit of general local government has the meaning given such term in section 102(1) of the Housing and Community Development Act ( 42 U.S.C. 5302(1) ). (7) Urban county The term urban county has the meaning given such term in section 102(6) of the Housing and Community Development Act ( 42 U.S.C. 5302(6) ). 4. Establishment Of Full Employment National Trust Fund (a) In general The Secretary shall establish a Full Employment National Trust Fund (in this Act referred to as the Trust Fund ) for the purposes of— (1) providing funding for the Employment Opportunity Grants established in section 5