25 Pa. Code § 126.515 – In-use surveillance testing.

(a) For the purposes of testing and monitoring, the overall effectiveness of the Pennsylvania Heavy-Duty Diesel Emissions Control Program in controlling emissions, the Department may conduct in-use surveillance testing after consultation with CARB, in accordance with Title 13 CCR, Division 3, Chapter 2, Article 3, § § 2150—2153, adopted and incorporated by reference.
(b) For purposes of program planning, in-use surveillance testing determinations and findings made by CARB apply.