My HOA just sent mail that cars parked on the street will be towed. It is not in CC&R and was not voted on HL

The base documents for any home owners association will define all rules and regs. It should also define what the process is for passing a new rule or reg.

So, your board may not have put it to full vote of the association. The bylaws may allow the board to pass a new regulation through board vote only. You need to study your bylaws to be certain.

If they are doing something unapproved, you can either get a lawyer to force compliance, or get the other homeowners together to demand accountability.

I don't think this is legal. Many people have parties and family gatherings. Parking on the street is necessary most times, especially in newer subdivisions where you can only park 2 cars side by side in a driveway. (My daughter's house is like that) I would be royally TICKED if my car was towed while I was visiting her and my grandchildren.

You should challenge this. Cars that are not running and parked on the street should be towed IMO. But to tow a car just because it's parked there maybe for a few hours or overnite. NO!

Is this a public street? If so, I don't think that they can enforce it. If it is a private street, you may still be right about it not being enforceable without there being any voting on it. Good luck.