SECTION 1. The definition of “Heavy duty vehicle” in section 1 of chapter 93K of the General Laws, as appearing in the 2016 Official Edition, is hereby amended by striking out the following words: – ; provided, however, that heavy duty vehicles built to custom specifications sold in the commonwealth for commercial purposes shall not be required to comply with subsection (d) of section 2.

SECTION 2. The first paragraph of subsection (d) of said chapter 93, as so appearing, is hereby amended by striking out the first sentence and inserting in place thereof the following sentence:– Beginning in model year 2018, except as provided in subsection (e), manufacturers of motor vehicles and heavy duty vehicles sold in the commonwealth shall provide access to their onboard diagnostic and repair information system, as required under this section, using an off-the-shelf personal computer with sufficient memory, processor speed, connectivity and other capabilities as specified by the vehicle manufacturer and: (i) a non-proprietary vehicle interface device that complies with the Society of Automotive Engineers standard J2534, Society of Automotive Engineers J1939, commonly referred to as SAE J2534 and SAE J1939, the International Organization for Standardization standard 22900, commonly referred to as ISO 22900 or any successor to SAE J2534, SAE J1939 or ISO 22900 as may be accepted or published by the Society of Automotive Engineers or the International Organization for Standardization; (ii) an onboard diagnostic and repair information system integrated and entirely self-contained within the vehicle, including, but not limited to, service information systems integrated into an onboard display; or (iii) a system that provides direct access to onboard diagnostic and repair information through a non-proprietary vehicle interface, such as ethernet, universal serial bus or digital versatile disc.