I think it comes under the Rules and is clearly within the stewards jurisdiction.
62.OFFENCES
62.1 Any person (including an Official) commits an offence if he/she:
(cc) acts in contravention of or fails to comply with any provision of these Rules or any Rules made thereunder, or any policy, notice, direction, instruction, guideline, restriction, requirement or condition given, made or imposed under these Rules;
1.4
Subject to these Rules theStewards shall have the power to investigate any matter or thing relating to these Rules including (without limitation) the following:
(a)To enter and inspect any land, track, building, vehicle or other place in, or about which such Meeting, Race, or Trialsare being held, or is about to be held, or has been conducted by any Club.
(b)To enter and inspect any land, track, building, vehicle or other place in which a Greyhound is being kept.