2 Miss. Code. R. 1-3-03-107.01
A person or firm who custom mixes fertilizer, materials or mixed fertilizer in any combination to specifications furnished by a consumer prior to mixing shall be called a custom-mixed fertilizer distributor. Such mixtures are not required to conform to an approved grade or ratio. Provided, however, mixtures must meet minimum requirements stated in sections 102.03 to 103.02 of this chapter. Such a custom mixer shall register his operation with the Commissioner of Agriculture and Commerce prior to performing any such mixing, pay the appropriate annual registration fee as outlined below, and shall make application to the Commissioner for a permit to report and pay quarterly the fertilizer inspection fee as required under the Mississippi Fertilizer Law of 1970.
2 Miss. Code. R. 1-3-03-107.01