The Price Adjustment Public Corporation may, when it deems necessary, demand those who engage in the business of supplying for designated prices, etc.(hereinafter called dealers), those who are in possession of the commodities owned by the dealers or those who receive the supply for designated prices, etc. from dealers to report on price adjustment, to present papers or to compile books, or it may in accordance with the provisions of ordinance let officials concerned inspect necessary places and examine the conditions of business or books, papers and other necessary matters.