40 Pa. Code § 11.236
When a manufacturer changes a product in formula, proof, label or container, a licensee may return its existing inventory for a refund of that product within 30 days of notification that the product has been changed. A change in vintage does not constitute a change in product for purposes of this section. The licensee will be assessed a handling charge in accordance with § 11.231(e) (relating to general provisions) for returns under this section.
This section cited in 40 Pa. Code § 11.231 (relating to general provisions); and 40 Pa. Code § 11.239 (relating to special order listings).