; and (4) increase the efficiency of coverage data collection. 608. Accuracy of 9–1–1 call location information (a) Proceeding required Not later than 18 months after the date of the enactment of this Act, the Commission shall conclude a proceeding to consider adopting rules to ensure that call location information is conveyed with a 9–1–1 call, regardless of the technological platform used and including with calls from multi-line telephone systems (as defined in section 6502 of the Middle Class Tax Relief and Job Creation Act of 2012 ( 47 U.S.C. 1471 )). (b) Relationship to other proceedings In conducting the proceeding required by subsection (a), the Commission may consider information and conclusions from other Commission proceedings regarding the accuracy of call location information, but nothing in this section shall be construed to require the Commission to reconsider any information or conclusion from a proceeding regarding the accuracy of call location information in which the Commission has adopted rules or issued an order before the date of the enactment of this Act. (c) Other authority In addition to the authority to adopt any rules the Commission finds to be necessary in the proceeding required by subsection (a), the Commission shall have the authority to adopt any other rules, technical standards, protocols, and procedures as are necessary to ensure that call location information is conveyed as described in such subsection. (d) Definitions In this section: (1) 9–1–1 call The term 9–1–1 call means a voice call that is placed, or a message that is sent by other means of communication, to a public safety answering point (as defined in section 222 of the Communications Act of 1934 ( 47 U.S.C. 222 )) for the purpose of requesting emergency services. (2) Call location information The term call location information means accurate and timely information regarding the location of the caller, as determined to be technically feasible and achievable by the Commission. 609. Interagency Communications Security