Q: L1 to E3 visa, can i do in the USA or back to Aus necessary?

I'm on a intracompany L1 transfer, applying for roles outside my company. I'm Australian and have 2 ques, can I do this from the USA or do I have to apply back from Australia and is it true there can be no break between my L1 and E3? I read somewhere I had 10 days between the two?

This question hasn't been answered yet.