Section D
OTHER RULES
When rule 22 or 23 applies between two boats, Section A rules do not.
21
EXONERATION
When a boat is sailing within the room or mark-room to which she is entitled, she shall be exonerated if, in an incident with a boat required to give her that room or mark-room,
  1. she breaks a rule of Section A, rule 15 or rule 16, or
  2. she is compelled to break rule 31.
22
STARTING ERRORS; TAKING PENALTIES; MOVING ASTERN
22.1
A boat sailing towards the pre-start side of the starting line or one of its extensions after her starting signal to start or to comply with rule 30.1 shall keep clear of a boat not doing so until she is completely on the pre-start side.
22.2
A boat taking a penalty shall keep clear of one that is not.
22.3
A boat moving astern, or sideways to windward, through the water by backing a sail shall keep clear of one that is not.
23
CAPSIZED, ANCHORED OR AGROUND; RESCUING
If possible, a boat shall avoid a boat that is capsized or has not regained control after capsizing, is anchored or aground, or is trying to help a person or vessel in danger.  A boat is capsized when her masthead is in the water.

24
INTERFERING WITH ANOTHER BOAT
24.1
If reasonably possible, a boat not racing shall not interfere with a boat that is racing.
24.2
If reasonably possible, a boat shall not interfere with a boat that is taking a penalty, sailing on another leg or subject to rule 22.1. However, after the starting signal this rule does not apply when the boat is sailing her proper course.