PDFWAC 260-20-016
Barns.
(1) All racing associations will ensure that the barns are kept clean and in good repair. At Class A and B racing associations, each barn, including the receiving and test barns, must have a hot and cold water supply available, be well-ventilated, and have proper drainage.
(2) All racing associations will ensure that each horse is stabled in an individual box stall with minimum dimensions of ten by ten feet.