Does the /clone command save NBT dat?

Question

I've been working on a small Minecraft map that uses the /clone command to copy command blocks to certain locations and I was wondering, does the /clone command save the NBT data of command blocks?

Answer 1

Yes, it does.
I tried an experiment in a single-player world with an infinite cloning machine, and it worked there. Also refer to this SethBling video, with basically the same thing except with a hopper clock.