The 2004 Nationwide Programmatic Agreement (NPA) for Review of Effects on Historic Properties for Certain Undertakings Approved by the Federal Communications Commission (FCC NPA) requires that applicants for an FCC permit comply with Section 106 of the National Historic Preservation Act (NHPA). ACS assists applicants with compliance by preparing Class I cultural resource literature reviews for proposed cell and radio tower facilities, assessing direct and visual impacts to cultural resources that are eligible for or listed on the National Register of Historic Places. ACS has conducted numerous cell tower projects for various clients throughout Arizona. A recent project involved assessing a location near four National Register historic districts in the Tucson market; the assessment concluded the monopalm would not introduce an additional visual impact to the historic resources. ACS can also assist with the preparation of the Form 620 (new tower) or 621 (collocation).