; and (2) any covered horse or covered person from a State that is not a member State that seeks to race in a covered horserace in a member State. (b) Development of proposed rules (1) In general In developing proposed scientific medication control rules with respect to a breed of covered horses, to the extent possible, a scientific medication control committee shall— (A) use scientific methods; (B) address all topics set forth in subsection (c); and (C) take into account the unique characteristics and needs of such breed and its racing performance model, including the varying number and nature of races each year for the breed. (2) Transition Until the date on which rules issued by the RHSO pursuant to section 101(c) become effective, the rules of the State concerned shall apply with respect to the administration of medication to covered horses racing in covered horseraces. (c) Elements The proposed rules referred to in subsection (b) shall provide— (1) that— (A) a covered horse may only compete in a covered horserace if the horse is— (i) free from the active pharmacological effect of medications, other foreign substances, and methods that enhance the natural performance of the covered horse; and (ii) unencumbered by— (I) foreign substances; and (II) diseases or conditions; (B) a covered horse that is injured or determined by a veterinarian to be unsound may not train or participate in a covered horserace; and (C) the use of medications, other foreign substances, and treatment methods that mask pain in order to allow an injured or unsound covered horse to train or race in a covered horserace shall be prohibited; (D) with respect to the uniformity of rules, standards, procedures, and protocols regulating medication and treatment methods for covered horses and covered horseraces, such rules, standards, procedures, and protocols— (i) shall be uniform within each breed of covered horse