Final answer:
The National Association of Realtors' Code of Ethics was first adopted in 1913 to maintain high integrity and professionalism in real estate business practices.
Step-by-step explanation:
The National Association of Realtors' Code of Ethics was first adopted in 1913. This set of guidelines was established to ensure that realtors conduct business with a high level of integrity and professionalism. Over time, these ethical standards have been revised to reflect changes in the law and industry practices.
While not specific to Realtors, the establishment of the National Recovery Administration (NRA) in 1933 under the New Deal also mandated codes for various industries, including the creation of minimum wages and maximum work hours to protect workers' rights.