In 1964 a “Tasman” Drivers' Championship was instituted. This is competed for on the major racing circuits in Australia and New Zealand. Races are run under a “Tasman” formula which imposes a limit of 2·5 litres unsupercharged and requires the use of 100/130 straight aviation petrol. Eight meetings – four in Australia and four in New Zealand – met the Tasman Cup standards in 1964, the four in New Zealand being those held at Auckland, Levin, Christchurch, and Teretonga (Invercargill). Points are awarded for the first six places in the New Zealand International Grand Prix and in any two of the remaining three New Zealand Tasman races. Similar conditions hold for the Australian races.