(a) Definitions
In this section:

(1) Eligible entity
The term "eligible entity" means—

(A) a producer of agricultural commodities;

(B) a cooperative association, a majority of the members of which produce or process agricultural commodities; or

(C) a person in the trade or business of—

(i) selling an agricultural product (including an agricultural chemical) at retail, predominantly to farmers and ranchers; or

(ii) aerial and ground application of an agricultural chemical.

(2) Nurse tank
The term "nurse tank" shall be considered to be a cargo tank (within the meaning of section 173.315(m) of title 49, Code of Federal Regulations, as in effect as of the date of the enactment of this Act).

(b) Grant authority
The Secretary may make a grant to an eligible entity to enable the eligible entity to obtain and add to an anhydrous ammonia fertilizer nurse tank a physical lock or a substance to reduce the amount of methamphetamine that can be produced from any anhydrous ammonia removed from the nurse tank.

(c) Grant amount
The amount of a grant made under this section to an eligible entity shall be the product obtained by multiplying—

(1) an amount not less than $40 and not more than $60, as determined by the Secretary; and

(2) the number of fertilizer nurse tanks of the eligible entity.

(d) Authorization of appropriations
There is authorized to be appropriated to the Secretary to make grants under this section $15,000,000 for the period of fiscal years 2008 through 2012.