To determine if "456" is the latest amendment, you are likely referring to , the Indian Standard code of practice for Plain and Reinforced Concrete.
All structural designs submitted for approval after 2014 must comply with the latest amendment unless exempted by local municipal authority. is 456 latest amendment pdf
BIS has circulated a draft for a fifth revision (likely to be IS 456:2024 or 2025). This draft includes groundbreaking changes: To determine if "456" is the latest amendment,
: The code's name will change to Structural Concrete: Code of Practice . Verification and Official Links you are likely referring to