261. A trainer shall not cause a horse he trains to start in a race where:(1) the horse is subject, under section 340, to the taking of an official sample which when analyzed might show the presence of a drug, or where a prohibited substance has been administered to the horse;
(2) the horse is in no condition to provide its normal performance in relation to the time standard concerning its capacity to run a certain distance;
(3) the horse is subject, under section 345.1, to the taking of a blood sample which when analysed might show a concentration of free carbon dioxide (TCO2) equal to or greater than 37 millimoles per litre of blood plasma;
(4) the horse is subject, under section 345.3, to the taking of a blood sample which when analysed might show a concentration of bicarbonate (HCO3) equal to or greater than 37 millimoles per litre of blood.