We will be doing construction work in the state of PA. In the contract the following wording appeared: "A subcontractor that fails to file a Notice of Furnishing on the Dept. of General Services publicly accessible Internet website as required by the act of August 24, 1963 (P.L. 1175, No. 497), know as the Mechanics Lien Law of 1963, may forfeit the right to file a mechanics lien. It is unlawful for a searchable project owner, project owner's agent, contractor or subcontractor to request, suggest, encourage or require a subcontractor no file the required notice as required by the Mechanics' Lien Law of 1963."