You can punch up to pin at after the starting signal because you are sailing your proper course
There is no mark-room at the starting mark when boats are approaching the start of the race. The preamble to Section C states that the section (rules 18-20) do not apply at a starting mark surrounded by water. Note: Rules 18-20 do apply if the boats are not starting (e.g. 2:00 before the start). In this scenario, the inside boats would be entitled to mark room.
You have to complete your tack before you can run someone up
Barging vs not barging at the race committee boat
Tactical Tip: Don't put yourself in a bad situation on the starting line
Punch up to the pin after starting signal.jpg
You don't have to steer up to avoid the leeward boat until they have overlap and start turning up