; stackable credential The terms portable and stackable , used with respect to a credential, have the meanings given the terms in the guidance document entitled Training and Employment Guidance Letter No. 15–10 , issued by the Assistant Secretary for Employment and Training of the Department of Labor on December 15, 2010. (6) Postsecondary educational institution The term postsecondary educational institution means an institution of higher education, as defined in section 102 of the Higher Education Act of 1965 ( 20 U.S.C. 1002 ). (7) Secretary The term Secretary means the Secretary of Health and Human Services, after consultation with the Secretary of Education and the Secretary of Labor. (8) Tribal area The term Tribal area means a reservation or other area that is served by a Tribal entity. (9) Tribal entity The term Tribal entity means an Indian Tribe or Tribal organization. (b) Grants to States and Tribal entities (1) Grants (A) In general The Secretary shall make grants to States and Tribal entities on a competitive basis under subparagraph (B) to pay for the Federal share of the cost of carrying out projects described in this Act, in order to increase access to quality child care, by eligible child care providers, in the States and Tribal areas. (B) Types of grants In making those grants, the Secretary may make— (i) a child care workforce grant for a State or Tribal project to develop and expand the workforce of eligible child care providers in child care deserts in the State or Tribal area