Section 25-31-1-18 - Corporate practice(a) A registration certificate for a professional engineer may be issued only to a natural person.(b) A business, including a proprietorship, partnership, or corporation, doing business in Indiana may not practice or offer to practice engineering unless that practice is carried on under the responsible direction and supervision of a registered professional engineer who is a full-time employee of the business. All plans, sheets of designs, specifications, reports, studies, or other engineering documents that require certification and are prepared by the personnel of a business must carry the signature and seal of the registered professional engineer who is in responsible charge of the professional engineering work.(Formerly: Acts 1935, c.148, s.18; Acts 1957, c.320, s.8; Acts 1961, c.277, s.8; Acts 1967, c.95, s.1.) As amended by P.L. 23-1991, SEC.25; P.L. 215-1993, SEC.18.