Ala. Code § 37-2-36: Personal Baggage of Passengers - Charge for Excess Baggage.

Every transportation company in this state shall charge passengers, on all baggage weighing over 150 pounds, sixteen and two-thirds percent of the regular fare to destination per 100 pounds in excess of the said 150 pounds, but no charge for any fraction of the first 100 pounds excess shall be less than $.10, which shall be the minimum amount said company shall charge for excess baggage as provided in this section.