§ 586. Substitution, addition and commingling of goods; license void; certain purchases prohibited. (a) Any substitution for or addition to goods described in an inventory filed pursuant to this article, or any change in the time or place of a sale conducted pursuant thereto, shall be unlawful and any license issued for such sale shall thereupon become void.

(b) Where an applicant, conducting a sale licensed under this article, also conducts a business of selling other goods, wares or merchandise not included in the inventory accompanying the application, the goods, wares and merchandise to be sold at such sale shall be clearly and distinctly segregated, marked or identified, and advertised, if at all, so that, both on display and in advertising, such goods, wares and merchandise may be readily distinguished from other goods, wares and merchandise and their identity readily ascertained. Any commingling of such goods, wares and merchandise with other goods, wares and merchandise of the licensee in such a manner as to cause them to lose their separate identity, either on display or in advertising, shall be unlawful and any license issued pursuant for such sale shall thereupon become void.