Land Surveyors Notice - Individual Professional Land Surveyor Registration - Not Enough Important Reminder to Registered Professional Land Surveyors - Each entity that practices or offers to practice land surveying in Rhode Island must hold a current Certificate of Authorization. This required "COA" is in addition to the individual's registration stamp. Check to make sure that your firm (whether sole proprietorship, corporation, partnership or LLC) has a current COA. Contact the State Board of Registration for Professional Land Surveyors with any questions. Design Professionals Board of Registration for Professional Land Surveyors Email: Dbr.email@example.com.