ECN Forum Forums Code Related Discussion NEC & other Code issues 250.32(B)(1) 2005 NEC

This article plainly states that a grounding conductor must be run with the supply conductors to a detached structure. Then reading on down to (2) it starts out "Where (1) an equipment grounding conductor is not run with the supply to the building or structure, (2) there are no continuous metallic paths .....the grounded conductor run with the supply shall be connected to the disconnecting means...."

So does this give up permission to run 3 conductors to a detached building if it meets 2 & 3? (under the 05 NEC)
Or is this referring to existing installations?

Also, does this change in later codes?

Thanks, B