1.2 Eligibility - clarified wording for handlers with multiple dogs

1.9 Allows brief introduction/review of unfamiliar  obstacles

2.3 Deleted collapsed tunnel as a league obstacle

2.6 Dog aggression toward handler - covered in sec 2.8

2.8 Knocking over a panel or "walking" over broad jump is 5 faults (same as dropped bar)

2.8 Reformatted as a table for readability