 In 1992, Secretary of the Interior Manuel Lujon signed a Memorandum of Understanding whereby the Department of the Interior committed to incorporate Washington Square into INHP, if the site could be brought up to National Park Service standards.After a 13-year undertaking to fund improvements and meet requirements, Washington Square was made part of Independence National Historical Park, which thereafter has overseen management and guided tours.In 2005, Lazin chaired the transfer ceremony from the City of Philadelphia to Independence National Historical Park.