In total, BULOG operates with a stock holding of at least 1 million tonnes of milled rice to perform these three functions, and has authority to build up its stock holding to 2 million tonnes. Finally, it must procure rice from farmers and/or millers at Government Purchase Prices (Harga Pembelian Pemerintah, HPP), which are set before the start of each season by the government through a Presidential Instruction (INPRES). Both were more instruments of control than of representation. The KUD concept was introduced in 1970 to function as a service centre for rural people residing in one or more villages.