Can the Nvidia CUDA compliant driver work with older CUDA versions

If I install CUDA 2.3 (when it’s out) and its corresponding video driver, can I use that same driver with an older CUDA like 2.2 or are the drivers only going to work with their particular CUDA version? This would mean moving the /usr/local/cuda directory and $home/NVIDIA_CUDA_SDK directories but that’s easy. But I’d rather not have to modify the video driver but just use the CUDA 2.3 driver for both.

Check page 5 of the CUDA best practices guide :)