N.Y. Comp. Codes R. & Regs. tit. 9, § 4020.3 – Definitions.

(a) The age of a horse is reckoned as beginning on the first of January in the year in which the horse is foaled.
(b) Association veterinarian means a veterinarian licensed by the commission and employed by a racing association or corporation.
(c) Attending veterinarian means a veterinarian licensed by the commission and hired by the owner or trainer.
1. (1) Authorized agent means a person appointed by a document signed by the owner and lodged annually at the office of The Jockey Club, or if for a single meeting only, with the clerk of the course for transmission to The Jockey Club.
2. (2) An authorized agent may appoint a subagent only when authorized so to do by the document lodged as above.
(d)
(e) A horse is bred at the place of its birth.
(f) Breeder of a horse means the owner of its dam at the time of foaling.
(g) Breeze means exercising a horse in a vigorous manner.
1. (1) Claiming race means a race in which every horse running in such race may be claimed in conformity to this Subchapter.
2. (2) Optional claiming race means a race restricted to horses entered to be claimed for a stated claiming price and to those that have started previously for that claiming price or less. In the case of horses entered to be claimed in such a race, the race will be considered, for the purposes of this Subchapter, a claiming race.
  (i)
3. (1) Handicap means a race in which the weights to be carried by the horses are adjusted by the handicapper for the purpose of equalizing their chances of winning.
4. (2) Free handicap means a handicap in which no liability is incurred for entrance money, stake or forfeit until acceptance of the weight, either directly or through omission to declare out.
5. (3) Highweight handicap means a handicap in which the top weight is not less than 140 pounds.
(h)
(j) A horse includes mare, gelding, colt and filly.
(k) Maiden means a horse that, at time of starting, has never won a race on the flat in any country.
(l) Match means a race between two horses, the property of two different owners, on terms agreed upon by them and to which no money or other prize is added. A match race is void if either owner dies.
(m) Nominator means the person in whose name a horse is entered for a race.
(n) Overnight race means a race for which the entries close 72 hours (exclusive of Sundays) or less before the time set for the first race of the day on which such race is to be run.
(o) Post race means a race in which the subscribers declare, at the usual time before a race for declaring to start, the horse or horses they are to run, without limitations of choice other than that prescribed by this Subchapter or the conditions of the race.
(p) Produce race means a race to be run by the produce of horses named or described at the time of entry.
(q) Purse means a race for money or other prize to which the owners of the horses engaged do not contribute.
(r) A race includes a stake, a purse, a sweepstakes, a private sweepstakes, a match or an overnight event, but does not include a steeplechase or hurdle race.
1. (1) Sweepstakes means a race in which the entrance fee, subscription and other contribution of three or more owners is distributed according to the conditions of the race. Any such race is still a sweepstakes when money or other prize is added, but no overnight race, whatever the conditions of such race, shall be considered to be a sweepstakes.
2. (2) Private sweepstakes means a sweepstakes to which no money or other prize is added and that, prior to closing, has not been advertised, either by publication or circular or entry blank, or in any other way.
(s)
(t) Untried horse means a horse whose produce are maidens.
(u) Walkover means a race without at least two horses owned by entirely different interests.
(v) Weight for age means standard weight according to this Article. A weight for age race is one in which all horses carry weight according to the scale without penalties or allowances.