Ohio Rev. Code § 5502.42
Application for a civil defense certificate of necessity shall be filed at such time, in such manner, and in such office as may be prescribed by rule adopted pursuant to section 5502.51 of the Revised Code, but no later than the expiration of six months after the beginning of construction, reconstruction, erection, or installation of the structure or the acquisition of the equipment. The application shall be in such form as may be prescribed by that rule and shall contain plans and specifications of the structure or structures, including all materials incorporated or to be incorporated therein, and a descriptive list of all equipment acquired or to be acquired. If the certifying authority finds that the facility or proposed facility is necessary in the interest of civil defense, is designed exclusively as a civil defense facility, and is suitable and reasonably adequate for the intended purpose, it shall issue a certificate to that effect. No structure or equipment shall be considered suitable and adequate unless it is constructed to provide reasonable protection against modern methods of warfare including nuclear, biological, and chemical warfare in accordance with any standards of adequacy furnished by the federal emergency management agency.
R.C. §5502.42