Mo. Rev. Stat. § 260.266: Wholesalers of lead-acid batteries, duties — storage of batteries, requirements.

1. Any person selling new lead-acid batteries at wholesale shall accept, at the point of transfer, in a quantity at least equal to the number of new lead-acid batteries purchased, used lead-acid batteries from customers, if offered by customers. A person accepting lead-acid batteries in transfer from an automotive battery retailer shall be allowed a period not to exceed ninety days to remove lead-acid batteries from the retail point of collection.

2. Lead-acid battery retailers and wholesalers shall not hold used lead-acid batteries for more than ninety days without the approval of the department and shall store used lead-acid batteries in a manner which will protect human health and the environment pursuant to regulations adopted by the department of natural resources under this chapter.