Federal departments and agencies. (7) Other activities as determined necessary by the Secretary. (c) Rule of construction Nothing in this section may be construed as altering or superseding the authority of the Secretary of Agriculture relating to food and agriculture. . (b) Clerical amendment The table of contents in section 1(b) of the Homeland Security Act of 2002 is amended by inserting after the item relating to section 527 the following new item: Sec. 528. Coordination of Department of Homeland Security efforts related to food, agriculture, and veterinary defense against terrorism. .