1970 NASCAR International Stock Car Racing Rule Book NASCAR Grand National Championship Circuit Section 20-33 -- Identification

a. Officially issued numbers must be at least eighteen inches high and neatly painted on both sides of the car, and on trunk lid (positioned in center of lid) and facing rear of car. A number 36 inches high must be painted on the roof, reading from the driver's side.

b. Numbers on car and division must correspond with car owner's registration card.

c. All decals or adhesive-backed emblems supplied by manufacturers for advertising or identification on Competition Touring Sedan race cars are limited in size to the area of a 32 square inch rectangle. Only decals of participating manufacturers will be permitted. Car sponsors or owners names are limited to six (6) inches in height. Slogans will not be permitted. Decal sizes will be determined by multiplying the widest dimension and longest dimension of any decal, regardless of the decal shape.

d. Block type numbers, as large as possible, must be on outer headlight and taillight covers.