Conn. Agencies Regs. § 12-574-A56
(k) Objection to distance of course. An objection to the distance of a course officially designated must be made not less than fifteen (15) minutes before the race.
(l) Objection to matters occurring in race. An objection to a horse on the ground of his not having run the proper course or of the race having been run on a wrong course or of any other matter occurring in the race must be made before the numbers of the horses placed in the race are confirmed officially.
(m) Time for making other objections.
(1) An objection on any of the following grounds may be received up to forty-eight (48) hours exclusive of Sunday after the last race of the last day of the meeting: