⚠️ DGMS Amendment, Suspension & Withdrawal of Approval – Complete Guide

DGMS approval is granted only when equipment meets all safety, quality & statutory requirements.
But DGMS has the authority to:

• Amend an approval
• Suspend an approval
• Withdraw (cancel) an approval

if the equipment becomes unsafe, modified, or non-compliant. This blog explains exact DGMS rules, causes, corrective actions, and the procedure followed — based on DGMS Approval Policy (2016).

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🔹 1. What is DGMS Amendment, Suspension & Withdrawal?

Term	Meaning
Amendment	Minor correction/updates to approval without cancellation
Suspension	Temporary stoppage of approval due to safety issues or non-compliance
Withdrawal	Permanent cancellation of approval – equipment becomes illegal

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🔹 2. When Does DGMS Amend an Approval?

Amendment is required for minor modifications, such as:

• Model number correction
• Change in component supplier
• Minor drawing corrections
• Change in product name
• BIS license number update

📌 No performance or design change is allowed without approval.

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🔹 3. Grounds for DGMS Suspension 

 DGMS suspends approval when:

  ⭐ A. Safety Concerns arise

• Sparks detected in FLP equipment
• IS circuits fail in methane exposure
• Electrical overheating
• Battery leakage
• Brake failure in BEVs

⭐ B. Poor field performance

• Frequent breakdowns
• Repeated component failures
• Wrong safety alarms
• Gas detectors giving incorrect readings

⭐ C. Complaints from Mines

DGMS receives valid complaints from:

• Mine Manager
• Agent
• Owner
• Workmen Inspector

⭐ D. Factory Audit Failures

• QMS non-compliance
• Fake BIS/QAR/QAN certificates
• Production deviations
• Poor quality control

⭐ E. Test Certificate Issues

• Expired test report
• Fake reports
• Invalid calibration

⭐ F. Unauthorized Design Change 

 Most common reason. Examples:

• Change in enclosure thickness
• New PCB design
• Change in flamepath dimensions
• Use of low-quality material

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🔹 4. Grounds for DGMS Withdrawal (Permanent Cancellation)

Withdrawal = complete cancellation of approval. DGMS withdraws approval when: 

⭐ A. Equipment caused an accident E.g., spark inside FLP enclosure → methane ignition. ⭐ B. Manufacturer commits fraud

• Fake test results
• False QAR/QAN
• Fake BIS license

⭐ C. Intentional design modification

Major modifications without DGMS permission. ⭐ D. Extremely poor safety record Across various mines. 

  ⭐ E. Repeated non-compliance after suspension Manufacturer fails to correct issues. 

  ⭐ F. International certification revoked IECEx/ATEX cancellation triggers DGMS cancellation.

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🔹 5. Procedure for DGMS Amendment Manufacturer → Submit Amendment Request (Form M) ↓ DGMS Scrutiny ↓ Updated documents submitted ↓ Approval amended Amendment is quick (10–20 days).

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🔹 6. Procedure for DGMS Suspension Complaint/Inspection/Fault ↓ DGMS Issues Show-Cause Notice to Manufacturer ↓ Manufacturer Submits Explanation ↓ DGMS Evaluates Safety Data ↓ Suspension Order Issued / Conditional Approval During suspension:

• No supply allowed
• Mines must stop using equipment
• Manufacturer must fix issues

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🔹 7. Procedure for DGMS Withdrawal (Full Cancellation)

Suspension → Reinvestigation → Manufacturer Corrective Action ↓ Failure to Comply / Serious Safety Issue ↓ DGMS Withdrawal Order ↓ Equipment Declared Illegal ↓ Mines Must Stop Using Immediately After withdrawal:

• Fresh approval is required
• Full testing again
• Factory audit again
• No exemption allowed

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🔹 8. Responsibilities of Stakeholders

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⭐ Manufacturer Responsibilities

• Report all modifications
• Maintain QMS & calibration
• Provide truthful documents
• Respond to DGMS notices
• Replace faulty equipment in mines
• Correct design issues immediately

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⭐ Mine Management Responsibilities

• Report failure or unsafe equipment
• Maintain user logbook
• Stop using suspended equipment
• Cooperate with DGMS inspection

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⭐ DGMS Responsibilities

• Enforce safety standards
• Investigate complaints
• Conduct factory audits
• Order corrective actions
• Protect miners from unsafe equipment

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🔹 9. Consequences of Suspension/Withdrawal

• Equipment becomes illegal to use
• Mines must stop using immediately
• Manufacturer reputational loss
• Mandatory re-testing
• Penalties & legal action possible
• Importers/agents may be blacklisted

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🔹 10. Examples of Scenarios Leading to Suspension/Withdrawal 

  ⚠️ Case 1: FLP Motor Producing Sparks → Immediate suspension. 

  ⚠️ Case 2: Gas Detector Showing Wrong Readings → Suspension + mandatory recalibration + retesting. 

  ⚠️ Case 3: Unauthorized PCB Design Modification → Withdrawal of approval. 

  ⚠️ Case 4: False BIS License Submitted → Permanent cancellation + legal action.

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🔥 25 MCQs (DGMS Style) with Answers

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1) DGMS may suspend approval if —

a) Equipment is too cheap
b) Sales increase
c) Safety issue reported
d) Mine closed
e) None
Ans: c

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2) Approval amendment is done using —

a) Form K
b) Form M
c) Form L
d) Form Z
e) None
Ans: b

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3) Unauthorized modification leads to —

a) Bonus
b) Decoration
c) Suspension/withdrawal
d) Promotion
e) None
Ans: c

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4) Withdrawal means —

a) Temporary stop
b) Permanent cancellation
c) Repainting
d) Discount
e) None
Ans: b

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5) DGMS issues ______ before suspension a) Bonus
b) Gift
c) Show-cause notice
d) Relay
e) None
Ans: c

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6) FLP equipment causing spark →

a) Ignore
b) Clean
c) Immediate suspension
d) Promote
e) None
Ans: c

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7) Mines must stop using equipment when — a) Colour fades
b) Approval is suspended/withdrawn
c) Rain comes
d) Manager changes
e) None
Ans: b

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8) Repeated failure →

a) Renewal
b) Withdrawal
c) Training
d) None
Ans: b

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9) DGMS withdrawal is —

a) Temporary
b) Permanent
c) For 1 day
d) Holiday
e) None
Ans: b

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10) Amendment is for —

a) Major design change
b) Minor corrections
c) Accidents
d) Weather
e) None
Ans: b

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11) Suspended equipment can be used after —

a) Festival
b) Payment
c) Reactivation by DGMS
d) Cleaning
e) None
Ans: c

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12) DGMS withdrawal may be caused by — a) Good performance
b) High demand
c) Fraudulent certificates
d) New logo
e) None
Ans: c

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13) Complaints may be submitted by —

a) Shopkeeper
b) Mine manager/agent
c) Driver
d) Visitor
e) None
Ans: b

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14) Severe accident due to equipment →

a) Prize
b) Report only
c) Immediate suspension/withdrawal
d) Hire more workers
e) None
Ans: c

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15) QMS failure during audit →

a) Renewal
b) Suspension
c) Promotion
d) Party
e) None
Ans: b

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16) After withdrawal, manufacturer needs — a) Loan
b) Fresh approval
c) Paint
d) None
e) None
Ans: b

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17) Fake test reports result in —

a) Appreciation
b) Discount
c) Legal action + withdrawal
d) Renewal
e) None
Ans: c

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18) Battery leakage in BEV →

a) Normal
b) Safety concern
c) Decoration
d) Painting
e) None
Ans: b

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19) Mines must report failures —

a) Yearly
b) Immediately
c) Never
d) Monthly
e) None
Ans: b

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20) Approval becomes invalid when —

a) Manager retires
b) Withdrawn by DGMS
c) Painting done
d) Road built
e) None
Ans: b

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21) Only minor change allowed in —

a) Suspension
b) Withdrawal
c) Amendment
d) Shutdown
e) None
Ans: c

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22) DGMS factory audit failure →

a) Reward
b) Lunch
c) Suspend renewal
d) Replace manager
e) None
Ans: c

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23) Equipment with expired approval →

a) Okay to use
b) Illegal
c) Free to use
d) Not required
e) None
Ans: b

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24) DGMS ensures withdrawal to —

a) Increase profit
b) Cut cost
c) Prevent accidents
d) Paint equipment
e) None
Ans: c

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25) Dirty equipment leads to —

a) Colour change
b) No withdrawal unless safety impacted
c) Automatic renewal
d) DGMS bonus
e) None
Ans: b

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🔚 Conclusion

The DGMS amendment, suspension, and withdrawal provisions safeguard miners from unsafe, modified, or poorly performing equipment.
Understanding these rules ensures:

• Compliance with DGMS
• Safe use of equipment
• Prevention of accidents
• Legal protection for mines and manufacturers

Every mining professional must follow DGMS approval conditions strictly.

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