Miss. Code Ann. § 19-13-19: Miss. Code Ann. § 19-13-19

The authority is hereby granted to boards of supervisors to purchase tractors, trucks and other machinery or equipment for use of the county or any road district of any county in constructing, reconstructing and maintaining public roads from any agency of the federal government authorized to sell and dispose of surplus property.

Such purchases may be made without first having advertised for bidders and without competitive bids having first been submitted.