may instruct consumers at the on-sale retail licensed premises regarding wines sold by the retail licensee. Notwithstanding subdivision (a), an on-sale retail licensee authorized to sell distilled spirits may instruct consumers at the on-sale retail licensed premises regarding distilled spirits. The instruction may include, without limitation, the history, nature, values, and characteristics of the product, and the methods of presenting and serving the product. The instruction of consumers may include the furnishing of not more than three tastings to any individual in one day. A single tasting of distilled spirits may not exceed one-fourth of one ounce and a single tasting of wine may not exceed one ounce. Nothing in this subdivision shall limit the giving away of samples pursuant to subdivision (a).