Truckers will have to have their rigs smog-checked and certified in order to operate legally in California under a bill signed into law by the state’s governor, Gavin Newsom.

The measure, Senate Bill 210, makes California the first state with a smog-check program for medium- and heavy-duty trucks. It provides the industry a few years of relief before the smog checks begin, though. The estimated startup date for an operational program is 2023.

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