Obtaining the Model Approval under Legal Metrology requires filling in and submitting certain documents. These are:
- Application duly filled
- Passport-size photographs of the applicant
- Technical details of the measuring apparatus
- Test reports from certification bodies
- Instrument’s printout or sketch
- Information concerning the means of sealing the apparatus
- Information regarding the marketing display
- Other business permits, if any
- Payment Receipt
Types of Certificate: Standard vs. Provisional
There are two certificates that get confused often, and getting this right matters for how you plan renewals.
Standard Certificate of Approval issued once testing is complete and the model is approved. It takes effect from the date it's published in the Official Gazette and carries no expiry date. It stays valid indefinitely unless the Central Government revokes or suspends it.
Provisional Certificate issued only when testing is expected to take longer than three months, letting the manufacturer produce the instrument at their own risk while testing continues. This one does expire: it's valid for a maximum of one year from issue, though the Central Government can extend that period on request.
If your instrument's standard certificate is later revoked it's not arbitrary the Rules limit revocation to specific grounds: the model no longer meets current standards, defects show up repeatedly in the field, the manufacturer breaches the certificate's conditions or the design or circuit has been significantly altered without a fresh approval.
Timeline & Renewal
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Timeline: Typically 4–8 weeks depending on how quickly documentation is submitted and how the instrument performs in testing. If testing is expected to run longer, a provisional certificate can keep you operating in the meantime.
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Renewal: The standard Model Approval Certificate does not need periodic renewal. It remains valid until revoked or suspended for one of the specific reasons above, or until you change the model enough to need fresh approval. Only the provisional certificate has a fixed one-year cap.
One more detail worth knowing: if you submit a model for testing and don't collect it within six months of approval or refusal, it's forfeited to the Central Government. Plan to retrieve your test sample once a decision is issued.
Once your model is approved, remember this is separate from not a substitute for the manufacturer, importer, dealer, or packer registration you'll also need. Most businesses handle their legal metrology certificate and Model Approval together through a single consultant to avoid submitting the same technical documents twice.