Link to doc: DR21-01 ALTERNATIVE STARTING PENALTY
As stated in the document's introduction, when the new quad came out with a new def for Start
and Sail the Course,
this took away the ability to simply change Rule 28 to provide for boats that are OCS to keep sailing and take a penalty. This is common in many of the growing and popular "Pursuit" style races, where each boat has a starting time based on their handicap and distance of race and they start slower boats first, as well as in "Big Boat" races like SuperYachts and VOR.
Please note that this development rule requires that it be implemented in the NOR, so if you have pursuit-style events coming up or other events where you traditionally had a no-return start, now's the time to take a look at what this Development Rule offers.