Miss. Code Ann. § 27-104-11

No general or special funds received under state law, except those for the legislature, or those made available for a special or particular purpose with the intention that they shall or may be expended immediately, shall be available for expenditure by the agency entitled thereto until estimates of the amount required for the agency shall have been submitted to and approved by the state fiscal officer, with copies of such estimates to be furnished to the legislative budget office.