A few states have attempted to register golf course architects, but they soon realize that there may only be 3 or 4 qualified to sit on a review panel to do what — "license" 3 or 4 others?
Jack Snyder can be credited with taking the matter to the highest court (to date) in a 1960s decision Snyder v. State of Arizona. Jack had not been paid for a job, he sued to get paid. The developer counter-sued, claiming that Jack was not "licensed" to practice golf design. Jack claimed that there could be no such license, as the practice was unique, unlike landscape architecture, and certainly not building architecture. The Arizona Supreme Court agreed with Snyder — it remains the highest court to rule on the subject as of this date.
In the Court's ruling, it was opined that golf course architecture involves a unique set of knowledge and skills that cannot be considered landscape architecture, architecture or engineering, and therefore, not subject to the licensing of those professions. And, that "golf course architects" had the right to use the word "architect" in combination with the other words; that this was not a violation of the prohibition to use "architect" in a title unless registered as a technical professional.
The term "Golf Course Architect" goes back many, many years — long before many states even considered registering professional architects or other professionals.