# Courts and Judicial Proceedings (GCJ)

## Title 10. Evidence

### Subtitle 3. Motor Vehicle Laws

#### Section 10-312

(a) Subject to subsection (b) of this section, in a prosecution for a diesel emissions standard violation under Title 23, Subtitle 4 of the Transportation Article, emissions test results from emissions test equipment as described in Sec. 23-402 of the Transportation Article are admissible at trial in any court with jurisdiction over the proceeding in the State.

(b) If at the time of testing, a diesel vehicle fails to meet the emissions standard established under Title 23, Subtitle 4 of the Transportation Article, the failure to meet the established emissions standard shall be prima facie evidence that the operator of the diesel vehicle violated the provisions of Title 23, Subtitle 4 of the Transportation Article.

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Md. Code Ann., Cts. & Jud. Proc. (as displayed at mgaleg.maryland.gov, October 16, 2026)