Sec. 18. (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.