58 Pa. Code § 163.135
A horse shall be considered to be owned by the person or other entity whose name appears in the proper place upon the foal certificate for the horse. Absent the proper name a sworn statement as to ownership may be accepted together with other pertinent information required by the Commission. Upon acceptance of the sworn statement and other required pertinent information, the Commission will direct the name of the person making the affidavit to be inserted at the proper place upon the foal certificate showing the affiant to be the true owner. If a horse is leased, the lease agreement shall accompany the foal certificate or sworn statement, or both, otherwise showing proper ownership of the leased horse. The lease agreement shall be subject to the approval of the Commission.
58 Pa. Code § 163.135