Way back in probably the 1960’s the FBI developed a training pistol match which was soon used by civilian shooters and called the Combat Match. We shot a variant on this in the UK in the late ’60s. Later this became the source of PPC and the 1500 Match – and the Australian (and New Zealand) Service Pistol Match.
In New Zealand Pistol NZ introduced Service Pistol in 1982 as the first “Action” style event here. Initially, as in Australia, the match was shot starting with the pistol at 45 degrees but we allowed, and indeed encouraged, the pistol to be stored in a holster as the shooters moved down the range. This was well before the introduction of NRA Action and IPSC matches, both of which did require drawing from the holster.