40 Pa. Code § 11.234
Products that may no longer be lawfully sold may be returned for a refund within 30 days of notification that the product may no longer lawfully be sold. This includes, but is not limited to, situations when, due to a change in statute, regulation or administrative procedure over which the licensee has no control, a particular size, brand or product is no longer permitted to be sold. The payment of a handling charge will be waived 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).