Ohio Rev. Code Ann. § 4703.30
As used in sections 4703.30 to 4703.49 of the Revised Code:
(B) "Landscape architecture" or "the practice of landscape architecture" includes:
(1) The preparation of master, site, and comprehensive development plans, the preparation of feasibility and site selection studies, and the supervision of the execution of projects thereon, in accordance with the accepted professional standards of public health, welfare, and safety, where the dominant purpose of such service involves:
(3) The following services as they relate to the practice of landscape architecture: