Even if this does pass before the Federal version, the attempt to rename the Atlanta airport will nonetheless be scuttled by the fact that Federal law supersedes Regional law.
The Atlanta airport is owned by the City of Atlanta and operated by the Atlanta Department of Aviation, and as such its name is determined by local authorities. As the most local subdivision of government represented, the region has the right to determine the names of these properties, as the Transportation Commission Initiative found that "the Southeast Region reserves the right to pass legislation affecting the operation of airports in the Southeast Region". Airport names are a right normally granted to local governments that the IDS has passed a specific law to reserve to the region - in none of that do I see the federal government having a right or power to rename these airports.
24 hours for objections to a final vote.