Your business card is considered an advertisement and must follow the same TREC and NAR rules as all other ads.
事实. An ad is considered any form of communication by or on behalf of a license holder designed to attract the public to use real estate brokerage services. This includes publications, 宣传册, radio or television broadcasts, 经营文具, 名片, 显示, 迹象, 广告牌, and all electronic media—email, 短信, 社交媒体, 和网站.
The only exception to the advertising rules is communication between a license holder and that license holder’s current client.