; (2) during a ballistic missile threat, including communications between Federal and State entities; and (3) regarding ballistic missile impact warnings to Federal and State entities and the general public. (b) Form The report required under subsection (a) shall be submitted in unclassified form, but may contain a classified annex. 4. Civil defense emergency best practices (a) Study (1) Not later than 180 days after the date of the enactment of this Act, the Secretary of Homeland Security, acting through the Federal Emergency Management Agency, shall conduct a study to identify best practices of the States selected under paragraph (2) regarding civil defense emergencies. Such study shall identify the following: (A) Plans of each State regarding communications between State, local, and Federal entities before, during, and after a civil defense emergency. (B) Plans of each State to communicate with residents before, during, and after a civil defense emergency. (C) Plans of each State to educate residents regarding civil defense emergencies. (D) Security plans of each State and local law enforcement agencies of each State regarding civil defense emergencies. (E) Contingency plans of each State to deliver aid, food, water, and temporary shelter in a civil defense emergency. (2) The Secretary of Homeland Security shall select not fewer than 13 States to participate in the study under this subsection, including— (A) Hawaii, Alaska, California, and Washington; (B) not fewer than five other States that border on an ocean or the Gulf of Mexico