Miss. Code § 25-3-1
For the purposes of this chapter the counties are divided into eight (8) classes, numbered from One to Eight, according to the 1930 total assessed valuation of the real, personal, and public service corporation property of each county, as follows:
Class Number One. - Shall be composed of all counties in which the assessed valuation equals and exceeds Twenty-five Million Dollars ($25,000,000.00).
Class Number Two. - Shall be composed of all counties in which the assessed valuation equals and exceeds Twenty Million Dollars ($20,000,000.00) and is less than Twenty-five Million Dollars ($25,000,000.00).
Class Number Three. - Shall be composed of all counties in which the assessed valuation equals and exceeds Fifteen Million Dollars ($15,000,000.00) and is less than Twenty Million Dollars ($20,000,000.00).
Class Number Four. - Shall be composed of all counties in which the assessed valuation equals and exceeds Ten Million Dollars ($10,000,000.00) and is less than Fifteen Million Dollars ($15,000,000.00).
Class Number Five. - Shall be composed of all counties in which the assessed valuation equals and exceeds Eight Million Dollars ($8,000,000.00) and is less than Ten Million Dollars ($10,000.000.00).
Class Number Six. - Shall be composed of all counties in which the assessed valuation equals and exceeds Six Million Dollars ($6,000,000.00) and is less than Eight Million Dollars ($8,000,000.00).
Class Number Seven. - Shall be composed of all counties in which the assessed valuation equals and exceeds Three Million Dollars ($3,000,000.00) and is less than Six Million Dollars ($6,000,000.00).
Class Number Eight. - Shall be composed of all counties in which the assessed valuation is less than Three Million Dollars ($3,000,000.00).
The assessed value of each county shall be determined by the amounts certified to the State Tax Commission by the clerk of the board of supervisors, the assessed value of all public service corporations as certified by the State Tax Commission, and, in counties where oil or gas is produced, the actual value of such oil at the point of production as certified to the counties by the State Tax Commission under the provisions of Sections 27-25-501 through 27-25-525, and the actual value of such gas at the point of production as certified by the State Tax Commission under the provisions of Sections 27-25-701 through 27-25-723; provided, however, that the actual value of oil or gas at the point of production in counties where oil or gas is produced shall not be included in the assessed value of such county in determining the classification of such county in the fixing of fees to tax collectors under Section 25-7-21.
In any year the assessed value of a county shows that its class has changed to a higher class, such county shall remain in its original class until the succeeding January first and then be classed according to such assessed value.
Nothing in this section shall be construed to lower the classification of any county from its classification under the assessment of 1930.
Miss. Code § 25-3-1