Amends GS 105-113.35 to set the tax on vapor products at three cents multiplied by the percent of nicotine concentration in the consumable product and by the volume of the consumable product in milliliters, rounded down to the nearest cent (was, the tax was five cents per fluid milliliter of consumable product). Requires invoices for vapor products issued by manufacturers to state the amount of nicotine in the consumable product in milligrams instead of milliliters and adds that they must also state the volume of the consumable products in milliliters and the percent of the nicotine concentration. Effective July 1, 2015.