Gridpedia introduced Chassis and safety
Deformable side structures and safety fuel tanks
Crushable structures around the fuel tanks became compulsory from the Spanish Grand Prix, along with a 575 kg minimum weight. Source
1973 rule changes
2 changes recorded for 1973. 1973 standings · results · ← 1972 · 1974 →
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introduced Race procedure
Safety car used for the first time
A pace car was used at the Canadian Grand Prix, causing confusion over the race order. The safety car was not formalised until 1993. Source