Wilder! I'm sure you meant that he could tack as long as he didn't break RRS 15: When a boat acquires right of way, she shall initially give the other boat room to keep clear, unless she acquires right of way because of the other boat’s actions.

Go for your layline and sail your proper course. It is good to announce your tack - they're expecting you to do it. They will take all the room you give them, but they almost certainly recognize it as a gift.