The International Slot Racing Association (ISRA) homologates certain parts every year to make them officially . Cutting rules for ISRA production body. If the USRA Rule Book does not display above, you need to install the Adobe Acrobat plugin for your browser, or download the PDF file from the following link. Anyone interested in reading or using these rules can find them here: In classic 1/32 slot car racing the emphasis is on scale and historical accuracy to the real. Bodies must be presentably-painted and carry at least. This article needs additional citations for verification. Each entrant will be given a timed run to record their fastest lap which will determine their starting position in the heats. Therefore if a car is moved. This system incorporates the following unique features which drivers must be aware of. Plating may be moved to facilitate soldering of chassis parts.