Miss. Code § 57-1-54
The Mississippi Development Authority shall be the Department of Economic and Community Development and shall retain all powers and duties granted by law to the Mississippi Department of Economic and Community Development and wherever the term "Mississippi Department of Economic and Community Development," "Department of Economic and Community Development," "Mississippi Department of Economic Development" or "Department of Economic Development" appears in any law the same shall mean the Mississippi Development Authority. The Mississippi Development Authority may continue to refer to itself as the Mississippi Department of Economic and Community Development for as long as it may deem necessary. The Executive Director of the Mississippi Development Authority may assign to the appropriate divisions such powers and duties as he deems appropriate to carry out its lawful duties.
Nothing in the Mississippi Executive Reorganization Act of 1989 [Laws, 1989, Chapter 544] shall be construed to eliminate or change in any manner the duties, functions or operations of the planning and development districts heretofore created by executive order of the Governor.
Miss. Code § 57-1-54