additional contents. Sealing the delay box enclosure so it would be easy to see if it was tampered with was also part of the process. The NHRA also created rules specifying how a drag racer electrically wired his race car, requiring racers to leave wires unbundled so they could be quickly and easily traced by eye. Rules were also created limiting how many interconnects could attach to the wire between the delay box and the transmission. NHRA track officials were empowered to inspect the wiring to insure it met with the new rules. The NHRA also began requiring delay box manufacturers to pay a fee and submit delay box designs for the NHRA's approval. Then the NHRA instituted rules which allowed only NHRA approved delay boxes at its race tracks. This included revealing trade secrets to the NHRA, while the NHRA refused to enter into Non-Disclosure Agreements with the delay box manufacturers. Once submitted for NHRA approval, and paying the fee, delay box manufactures were not allowed to make any changes in design for any reason without resubmitting to the NHRA for re-approval and paying another fee. To obtain the NHRA's approval, delay box manufacturers had to accommodate the NHRA by making any design changes the NHRA mandated. Essentially the NHRA was now designing delay boxes by proxy. Furthermore, drag racers were prevented from using any delay box they made themselves at home. This is changed the face of drag racing in a huge way. Traditionally, grass roots drag racing was where racers could build their own chassis, engine, transmission, differential, vehicle plumbing & vehicle wiring, etc. Skilled racers could build their own race car with their own hands from parts wherever they acquired them. Racers were not required to buy anything pre-made if they didn't want to. Those days became history almost overnight. Virtually any racer innovation (electronic or mechanical) now came into question and could cause disqualification. An NHRA track could deny the ability to race at their track if they saw something homemade on a race car. The path to racing with the least worry about being disqualified was to buy everything for the car from approved NHRA manufacturers (other sanctioning bodies quickly followed suit, such as the IHRA, NMCA, and others). Only a few delay box manufacturers were willing to pay NHRA delay box approval fees and submit designs for the NHRA's approval without getting a