; (B) engaging with applicants on the certification or approval process; (C) providing clear and consistent guidance to industry standards organizations, including setting either a target level of safety or an acceptable level of risk; (D) promptly responding to questions from any person seeking an approval described in subparagraphs (C) through (D) of section 44811(c)(2); and (E) taking all necessary steps to move the unmanned aircraft system certification and acceptance processes forward without avoidable delay. (4) UAS Special Airworthiness Certificate Approvals The Associate Administrator shall have the authority to grant or deny an application for any approval described in section 44811, upon review of the recommendations of the Unit and after consultation with the managers of the Aircraft Certification Service and Flight Standards Service, if either manager requests consultation. . 5. Use of modeling and simulation tools in unmanned aircraft test ranges; program extension (a) Use of modeling and simulation tools Section 44803(b) of title 49, United States Code, is amended— (1) in paragraph (11), by striking the period at the end and inserting ; and