Ohio Revised Code Title XXXIX. Insurance § 3901.77

(A) The superintendent of insurance shall adopt the forms, instructions, and manuals prescribed by the national association of insurance commissioners, for the preparation and filing of statutory financial statements and other financial information.  However, the superintendent may by rule adopt modifications to the prescribed forms, instructions, and manuals as the superintendent considers necessary.

(B) For circumstances not addressed by the forms, instructions, and manuals prescribed by the national association of insurance commissioners, the superintendent may determine accounting practices and methods for purposes of preparing statutory financial statements and other financial information.

(C) The superintendent shall furnish each domestic insurance company the forms for the filing of statutory financial statements and other financial information required to be made by it.