Under this act, the board shall have the power and its duty shall be:
"Best-selling items" shall mean the one hundred fifty (150) most sold product identification numbers of wine and the one hundred fifty (150) most sold product identification numbers of liquor as measured by the total number of units sold on a six- month basis calculated every January 1 and July 1.
"Discontinued items" shall mean those product identification numbers that the board has voted to delist at a public meeting.
"Limited purchase items" shall mean those product identification numbers that the board purchases on either a one- time or nonrecurring basis due to the product's limited availability or finite allocation.
"Product identification number" shall mean the stock keeping unit (SKU) or a successor method of identifying specific products.
47 P.S. § 2-207