The Rules for Street legal are "their" Rules as in most any type of race it is about "their" rules.
Most Tracks will ask for the things in Bold for their Street legal races.
VEHICLE RULES FOR ALL CLASSES
•The event is open to four-wheel vehicles of any year, make, or model, except where limited by individual class
rules. Motorcycle-based vehicles are not allowed.
•
All entries must have current and legal vehicle registration and insurance with paperwork that matches the
VIN and license plate on the car. No dealer or manufacturer plates are allowed.
•No rental cars allowed.
•Vehicles in competition must have functional headlights, taillights, brake lights, turn signals, horn, and a
rear view mirror.
•Equipment rules apply to both the street and track portions of the event.
•All tire rules apply only on the drag strip and not for the street drive.
•All entries are required to use purpose-built drag-race drive tires on the track, including slicks, DOT-approved
slicks, or drag radials. No conventional treaded street tires.
And then there are lots more depending on the ET. for NHRA and IHRA
•All vehicles must meet NHRA safety rules for the e.t. and speed they are capable of, and drivers must be
IHRA or NHRA licensed if required. Drag Week officials will not accept time slips that are quicker or faster than
the car or driver’s tech’d legal e.t. and mph. Running quicker than the safety equipment or driver’s race license
allows is cause for disqualification at the discretion of the race director.
Here is the whole list!
https://www.motortrend.com/uploads/2022/01/2022-2024-DRAG-WEEK-CLASS-RULES-DF-V3-FINAL.pdf