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Consumer Affairs

Legal Metrology (Indian Standard Time) Rules, 2026


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Regulatory update
Importer & Manufacturer   |   Source: Consumer Affairs
Published On: 29-08-2026

Enforcement Date: 28 February, 2027
Legal Metrology (Indian Standard Time) Rules, 2026

The Department of Consumer Affairs has released Legal Metrology (Indian Standard Time) Rules, 2026 om 27 Aug, 2026 which will be implemented from 180 days from their publication in official gazette. The main purpose of this regulation is to provide framework for maintenance, synchronization and use of Indian standard time to ensure unform adoption of IST across country and promote accuracy, traceability and security in governance, public services, commerce, industry, critical infrastructure and by the public.


The Department of Consumer Affairs has released Legal Metrology (Indian Standard Time) Rules, 2026 om 27 Aug, 2026 which will be implemented from 180 days from their publication in official gazette. The main purpose of this regulation is to provide framework for maintenance, synchronization and use of Indian standard time to ensure unform adoption of IST across country and promote accuracy, traceability and security in governance, public services, commerce, industry, critical infrastructure and by the public. These rules also stated that the base unit of time shall be second “s”  and the standard format for Indian standard time (IST) is HH:MM:SS and standard format for Indian Standard Time (IST) with date is DD-MM-YYYY- HH:MM:SS The Council of Scientific and Industrial Research - National Physical Laboratory (CSIR-NPL), Regional Reference Standards Laboratories (RRSLs), the Indian Space Research Organisation (ISRO), and other authorized timing agencies will provide Coordinated Universal Time (UTC-NPLI) and Indian Standard Time (IST) through their official time and frequency distribution services. No entity shall use, display or record any time reference other than Indian standard Time (IST) for all purposes.

Applicable For: Importer & Manufacturer
Reference Number: CG-DL-E-29082026-275852 Notification Link

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