Environment requirement for signing/fetching

When you do `request_cert --environment dev` this generates a unique ID which I assume is specific to that environment/request. I would assume that I should be able to do `sign_cert ` and be able to drop the `--environment dev` from the command but this is not the case. What's interesting is that I can do `sign_cert --environment other ` and it works. I think the requirement of `--environment` should be dropped altogether for the `sign_cert` and `request_cert` operations.

Thoughts?