Miss. Code § 23-15-247
The election commissioners in each county shall procure, if not already provided, a sufficient number of ballot boxes, which shall be distributed by them to the voting precincts of the county before the time for opening the polls. The boxes shall be securely sealed from the opening of the polls on election day until the polls close on election day; and the box shall be kept by one (1) of the managers, and the manager having the box shall carefully keep it, and neither open it himself or herself nor permit it to be opened, nor permit any person to have any access to it throughout the voting period during an election. The box shall not be removed from the polling building or place after the polls are opened until the polls close and the count is complete. After each election the ballot boxes shall be delivered to the clerk of the circuit court of the county for preservation; and he or she shall keep them for future use, and, when called for, deliver them to the election commissioners.
Miss. Code § 23-15-247