Section 204: Laboratory test

Motor Vehicles Act • Official Statutory Text & Practice Guide

Statutory Regulation
Legal Standard
Competent Court / Tribunal
Act 1988

Legal Commentary & Landmark Judgments: Section 204

Section 204 of the Motor Vehicles Act, 1988 governs the mandatory laboratory analysis of blood and urine specimens taken from persons suspected of driving under the influence of alcohol or drugs, establishing strict statutory protocols and evidentiary standards for chemical analysis.

  • Statutory Requisition for Laboratory Blood Testing: Section 204(1) authorizes a police officer to require an arrested person to provide a specimen of blood for laboratory examination if the preliminary breath test indicates alcohol or if the person refused the breath test under Section 203.
  • Strict Medical Safeguards and Physician Administration: Section 204(2) mandates that a blood specimen can only be drawn by a registered medical practitioner at a hospital or police station, ensuring sterile medical conditions and patient safety.
  • Adverse Inference and Evidentiary Weight: Section 204(3) to (5) decrees that unreasonable refusal to provide a specimen may be treated by the trial court as supporting evidence of drunkenness, and governs the chain of custody and forensic transmission of blood vials to the State Forensic Science Laboratory.
Key Landmark Precedents:
  • Selvi v. State of Karnataka (2010) 7 SCC 263: The Supreme Court held that the extraction of bodily substances like blood samples under statutory medical examination provisions (such as Section 204 MV Act r/w Section 53 CrPC) is constitutionally valid and does not violate the fundamental right against self-incrimination under Article 20(3).
  • State of Maharashtra v. Som Nath Thapa (1996) 4 SCC 659: The Supreme Court emphasized that scientific evidence derived from chemical and laboratory analysis requires unbroken chain of custody proof to rule out sample contamination or tampering before it can form the basis of a criminal conviction.
Courtroom Practice & Strategic Litigation Guidance:

In blood alcohol prosecutions, scrutinize the chemical examiner's report and hospital MLC for preservation protocols (such as adding sodium fluoride preservative and storage at 4°C). If the prosecution fails to prove the unbroken chain of custody from the medical officer to the forensic laboratory, object to its admissibility under Section 204.