Dear brother,
Send only the ones asked for, that will be playing it by the book.
Send it to the same person who sent you the letter but still call the office and ask them. I don't know why they haven't mentioned it in the letter. Confusion actually arises because i assume it must have been sent by the Assistant Director (CE) office but the rules on the other hand mentions all correspondence to be addressed to the Secretary only. Brother, i actually don't remember who i sent it to because my case was almost 2 years ago. Please enquire from the office lest i misinform you.
Regards.

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A fool can ask a wise man more questions than he can answer....