Are there any US code approved flexible waste pipes for toilets?

[aether]

Hi there, I am a college student working on a project that involves plumbing. My team and I are currently at a bit of a snag though. We need to be able to bend and move the waste pipe for our toilet but are not sure if flexible/corrugated/accordion pipes are code approved in the US. Any info on whether there are types of pipes that are approved or where to find if something is approved would be great!

 

[oz-plumber]

The US is the same as the rest of the world.

Anything stamped or tagged "Made in China" is approved anywhere for anything!!!!

Just check with your local authority.
Personally I wouldn't use flexible connectors on any waste pipe