37 Pa. Code § 151.10
In order to assure that displaced persons actually receive the maximum amount of special damages for dislocation payable under Article VI-A of the act (26 P. S. §§ 1-601A-1-606A), the amount of the damages offered to a displaced person by an acquiring agency on its own initiative shall not be considered as damages paid to the displaced person for the purpose of determining the amount of a contingent attorney fee. This paragraph applies, not only to the original offer made by the acquiring agency to the displaced person, but to a subsequent increase in the offer initiated by the acquiring agency, whether made before or after the displaced person engaged the attorney's services; provided, however, that this paragraph will not apply to an original or increased offer or payment obtained as a direct result of the attorney's services on behalf of the displaced person.
37 Pa. Code § 151.10