SB 2566 amends the Texas Public Information Act to enhance the ability of legislators to access public records for legislative purposes. It grants a special right of access to public information, including confidential records, for legislators and legislative committees. It allows lawmakers to delegate this access to their staff and prohibits government entities from charging fees for providing these records. Additionally, it imposes penalties on government bodies that fail to comply, including administrative fines of up to $5,000 per violation per day.