; (B) to implement the recommendations of the Commission; (C) to carry out activities leading to comprehensive rural and Tribal health care workforce development strategies, including public health workforce development, at the State and local levels; and (D) in a manner that ensures such grants supplement rather than supplant the efforts of grantees to address rural health workforce challenges. (f) Authorization of appropriations (1) Authorization There are authorized to be appropriated such sums as may be necessary to carry out this section. (2) Set aside The Secretary shall set aside 5 percent of amounts appropriated under this subsection for direct grants to Indian Tribes (as such term is defined in section 4 of the Indian Health Care Improvement Act ( 25 U.S.C. 1603 )) and Tribal organizations (as such term is defined in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 450b )). (3) Gifts and services The Commission may not accept gifts, bequeaths, or donations of property, but may accept and use donations of services for purposes of carrying out this section. (g) Definitions (1) Health care workforce In this section, the term health care workforce has the meaning given such term in section 5101(i)(1) of the Patient Protection and Affordable Care Act ( 42 U.S.C. 294q ). (2) Tribal In this section, the term Tribal has the same meaning given such term in section 4 of the Indian Health Care Improvement Act ( 25 U.S.C. 1603 ).