47 Pa. Stat. § 5-513
Every place operated under license secured under the provisions of this article where any alcohol, liquor or malt or brewed beverage covered by the license is manufactured, produced, distilled, developed or used in the process of manufacture, denatured, redistilled, rectified, blended, recovered, reused, held in bond, stored for hire or in connection with a licensee's business, shall be subject to inspection by members of the board or by persons duly authorized and designated by the board at any and all times of the day or night, as they may deem necessary, (a) for the detection of violations of this act or of the rules and regulations of the board promulgated under the authority of this act, or (b) for the purpose of ascertaining the correctness of the records required by this act to be kept by licensees and the books and records of licensees, and the books and records of their customers, in so far as they relate to purchases from said licensees, shall at all times be open to inspection by the members of the board or by persons duly authorized and designated by the board for the purpose of making inspections as authorized by this section. Members of the board and the persons duly authorized and designated by the board shall have the right, without fee or hindrance, to enter any place which is subject to inspection hereunder, or any place where records subject to inspection hereunder are kept, for the purpose of making such inspections.
47 P.S. § 5-513