I think we are talking about a number of different things here.
CKD traditionally was a car built in a factory and then taken apart and packed into smaller assemblies and crated for dispatch. Most manufacturers however didn't build the whole car, only the major assemblies and packed them into crates for dispatch. Land Rover made kits of 6 vehicles. One crate would hold 6 chassis another 6 engines etc.
Local content rules added a level of complexity. the 1953 80 Land Rover for example had wheel rims, tyres, batteries made in Australia, Lucas headlamps made in Oz etc on top of the CKD kits being opened and the vehicles assembled in australia. In the 1980s UK built Range Rovers had their brake pads and batteries removed and replaced with the same parts manufactured in Oz.
You can build a car from a set of individually imported parts, but it would then be considered a new individually constructed car and be required to meet 2012 ADR, not CKD.

