I could find nothing in the MA law regarding US DOT or E code lights:
https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXIV/Chapter90/Section7

If Canadian specs are OK, then Ecodes should also work. Starting in 2003, headlight standards changed for the DOT, which is why Volvo came out with the 'jeweled' lights. I remember when sealed beam headlights were required, the bulb could not be replaced as it was part of the headlight - those were DOT rules.

How about the 'new' plastic covered headlights that are so yellowed that there is no light shining down the road? I bet they don't have DOT stamped on them.

I expect that inspection stations only verify that the headlights work, ignoring beam pointing, pattern, adjustment, or hazy lenses.
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Keeping it running is better than buying new