Income from and deductions connected with the rental of real property, and gain and loss from the sale, exchange, or other disposition of real property shall not be subject to allocation under § 109.5 (relating to apportionment and allocation of income from a business carried on partly within and partly without this Commonwealth), but considered as entirely derived from or connected with the state in which such real property is located.
61 Pa. Code § 109.6
This section cited in 61 Pa. Code § 109.5 (relating to apportionment and allocation of income from a business, carried on partly within and partly without this Commonwealth).