A dealer determines the trade-in allowance that is deducted from the purchase price of another vehicle. A trade-in allowance may not be divided or deducted from the purchase price of more than one vehicle. Only one traded-in vehicle can be applied to a sales transaction for purposes of the trade-in allowance deduction. A vehicle titled in Maryland or out-of-State may be used as a trade-in. If the vehicle traded-in is subject to a lien, the owner or co-owners of the vehicle are entitled to the full trade-in allowance, as stated in §A of this regulation, and deducted from the total purchase price. The trade-in allowance is not limited to the amount of equity the owner has in the vehicle. If the trade-in allowance exceeds the trade-in value indicated in a national publication of used car values adopted for use by the Administration, the dealer shall provide documentation that satisfies the Administration that the higher trade-in value is justified. Documentation includes: Evidence of the amount required to release the lien on the trade-in vehicle; Evidence of the vehicle customization that increases the vehicle value; A current valuation from an alternative national publication; or If the traded-in vehicle has already been sold, the actual resale price of the trade-in vehicle.