(a) A horse shall be deemed unqualified and must qualify once before being allowed to start in any overnight pari-mutuel event for the following reasons:

1. (1) The horse does not show a charted line of a current performance meeting the qualifying standards at the track for the class of race. Current performance shall be defined as a start within 30 days of the date of the race to which declared. Official workouts shall be acceptable as qualifying performances for this paragraph for horses with previous satisfactory races. The commission may extend the qualifying standards from 30 to as many days as appropriate to account for track closings, equine sickness, inclement weather or other unexpected events that interfere with the opportunities for otherwise eligible horses to race.

   1. (i) Notwithstanding the requirements stated in paragraph (1) of this subdivision, during the period of April 4, 2012 through May 4, 2012 inclusive, current performance shall be defined as a start within 60 days of the date of the race to which declared.
2. (2) The horse is changing gait.
3. (3) The horse does not meet additional standards prescribed by the racing secretary and posted in the declaration room.
4. (4) The judges, in their discretion, determine a horse to be unqualified because, without interference to it, it has made breaks in two consecutive purse races or in the purse race immediately following its qualifying to race.