The Ohio State Board of Registration for Professional Engineers and Surveyors has a notice that your professional engineers may be interested in.  It starts as follows:  "With the increased engineering and surveying activity in Ohio related to oil and gas extraction the Board has received several questions concerning the registration process and the requirements for individuals and firms that want to come into Ohio and provide engineering and surveying services to the oil and gas companies. Ohio law requires individuals offering and providing engineering and surveying to be registered in Ohio. Likewise, firms offering and providing engineering and surveying services in Ohio must be registered and obtain a Certificate of Authorization BEFORE offering, contracting or performing engineering or surveying services."

If your a PE working in Ohio, or employ one, read it all.