The department, or an entity with which the department contracts, shall provide to a drug manufacturer that sells drugs for prescribed use in this state documents designed for use by the manufacturer in entering into a rebate agreement with the department or entity that is modeled on the rebate agreement specified under 42 USC 1396r-8. A rebate agreement under this subsection shall include all of the following as requirements:
(a)#
That, except as provided in sub. (7) (b), the manufacturer shall make rebate payments for each prescription drug of the manufacturer that is prescribed for and purchased by persons who meet criteria under sub. (2) (a) and persons who meet criteria under sub. (2) (b) and have paid the deductible under sub. (3) (b) 2. a., to the secretary of administration to be credited to the appropriation account under s. 20.435 (4) (j), each calendar quarter or according to a schedule established by the department.
(b)#
That, except as provided in sub. (7) (b), the amount of the rebate payment shall be determined by a method specified in 42 USC 1396r-8 (c).