services to State agencies and Federally Recognized Tribes participating in the Food Distribution Program on Indian Reservations: Provided further , That this appropriation shall be subject to any work registration or workfare requirements as may be required by law: Provided further , That funds made available for Employment and Training under this heading shall remain available through September 30, 2019: Provided further , That funds made available under this heading for section 28(d)(1), section 4(b), and section 27(a) of the Food and Nutrition Act of 2008 shall remain available through September 30, 2019: Provided further , That funds made available under this heading may be used to enter into contracts and employ staff to conduct studies, evaluations, or to conduct activities related to program integrity provided that such activities are authorized by the Food and Nutrition Act of 2008. Commodity assistance program For necessary expenses to carry out disaster assistance and the Commodity Supplemental Food Program as authorized by section 4(a) of the Agriculture and Consumer Protection Act of 1973 ( 7 U.S.C. 612c note)