A licensed trainer may apply for a license on behalf of the owner he represents by signing the application for the owner's license as if he had the power of attorney from the owner, for example, John Doe, owner per Richard Poe, trainer (signature of applicant).
58 Pa. Code § 163.53
This section cited in 58 Pa. Code § 163.251 (relating to general provisions); and 58 Pa. Code § 165.31 (relating to occupational and participation licenses).