Miss. Code Ann. § 27-1-25

The county assessor shall devote his entire time to the duties of his office. The office of the assessor shall be open for business at all such times as other county offices within the county are required, pursuant to Section 25-1-99, Mississippi Code of 1972, to be open for business and, except when necessarily absent on official business, the assessor, or his deputy, shall remain in the assessor’s office during the time the office is open for business.