Hope this summary of Rule 16.2 (Changing Course) helps.

There are several significant changes to rule 16.2, which is often referred to as the “anti-hunting” rule. First, it now only applies when boats are on a “beat to windward.” Therefore, it does not apply before the starting signal (same as the previous rule); and it does not apply when the boats are sailing on downwind legs (different from the previous rule). Also, the rule only applies when the starboard-tack boat (S) bears away; it no longer applies when S luffs (rule 16.1 applies when S changes course to windward; i.e., luffs). And finally, the rule applies when the port-tack boat (P) is sailing to pass “to leeward” of S (the previous rule said pass “astern”), meaning that S can no longer turn this rule off by bearing away below 90 degrees to the true wind (a common move in team racing).