revise the duties of the Transportation Commission to include responsibilities of the South Dakota Railroad Board and the South Dakota Aeronautics Commission.

SB 70 consolidates the South Dakota Railroad Board and Aeronautics Commission into the existing Transportation Commission. The bill revises state law to transfer all railroad and aviation oversight responsibilities - including rail operations, airport funding, and aviation rulemaking - to the Transportation Commission. This change affects how the state manages transportation infrastructure, as the single commission now handles both rail and aviation matters. The bill modifies multiple sections of the law (e.g., amending Sections 1-44-4, 1-44-20, and adding new provisions) to reflect this consolidation without creating new policies.