Thank you for the people who read my post.
I have got the answer.
With TR, you need a letter from a sponsor which says "they need a physio due to lacks of physio","I am supervising the person".
With the letter, you can register each state physio board, that is TR.
I cannot register without the aecop except this way.

Thank you,

All the best for the candidates for the aecop exam.

Yours sincerely,
Eunju Lee