40 Pa. Code § 9.32
Except as otherwise provided in this subchapter, liquor imported into or purchased within this Commonwealth, and sold by the holder of an Importer License, shall be in the original container in which it was received by the importer, and as capped, corked and labeled by the manufacturer. The liquors, imported or purchased within this Commonwealth, may not be reduced, repackaged, fortified, blended, rectified or compounded by the importer unless he also holds a Manufacturer License. The holder of an Importer License may have liquor imported or purchased by him in this Commonwealth in bulk, bottled for him by the holder of a Manufacturer License. The bulk liquor shall be bottled straight or reduced in proof only, and may not be fortified, blended, rectified or compounded.
40 Pa. Code § 9.32