The Bureau of Indian Standards (BIS) on November 10, 2025, issued the date of withdrawal to certain Indian Standards (IS).
The amendment to the following IS have been withdrawn on October 30, 2025 namely: -
• IS/ISO 50045 : 2019 Technical Guidelines for the Evaluation of Energy Savings of Thermal Power Plants
[Notification No. HQ-PUB017/1/2020-PUB-BIS (1358)]