Miss. Code § 65-33-15
Except as herein to the contrary provided, such counties, acting by and through their respective boards of supervisors in the performance of the powers and duties hereunder granted and provided, shall have and may exercise all powers and rights, including but not limited to the right of eminent domain heretofore granted by and under this chapter.
The provisions of Sections 65-33-1 through 65-33-15 are additional and supplemental to all other powers heretofore or hereafter granted to counties, and no county shall be deemed to be required to issue bonds under the provisions hereof. Unless and until a county shall have issued bonds under the provisions hereof, such county shall not be obligated by any of the provisions of said sections, and may avail itself of any law now or hereafter enacted and which may contain other and different provisions concerning the application of the revenues herein referred to.
Miss. Code § 65-33-15