However, there is a critical technical and legal nuance that every professional must understand before using any version of this code, especially the 1978 edition. This article clarifies the status of IS 456:1978, explains why you might still see it referenced, and provides the correct, legal way to access the latest version of the code.
If you are looking for the latest version of the code, we recommend accessing the Bureau of Indian Standards (BIS) website or other authorized sources.
Despite being outdated, several reasons keep the 1978 version in circulation: