Ohio Rev. Code § 1746.03
No business trust shall be authorized to transact business in this state unless it complies with section 1746.04 of the Revised Code, except that a business trust that is transacting business in this state on the effective date of this section may continue to transact business in this state without complying with this chapter and, if it makes the filings described in section 1746.04 of the Revised Code, shall be deemed to have elected to operate under this chapter. A business trust shall be deemed to be transacting business in this state for purposes of this chapter only if such business trust maintains a place of business in this state from which it regularly engages on its own behalf in activities permitted by its trust instrument and permitted under this chapter, provided that nothing contained in this chapter shall prohibit any business trust that does not transact business within the meaning set forth in this section from voluntarily complying with the provisions of this chapter.
R.C. §1746.03