CARB survey letter

I had posted this yesterday but it vanished from the Mopar General Discussion forum except wrong forum or maybe not kosher , I've been driving since 1969 and have never had a survey about any older car I've owned.
Received the CARB survey and another person said that they want to know your usage, storage and what you do with the fuel if you don't drive often on pre-1978 vehicles for study info, any info on these surveys. If not allowed, would appreciate a Mod letting me know that's the case,

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