Dr. Evelyn Reid, a well-established family physician in a suburban clinic in Calgary, Alberta, has been approached by Mr. Alex Chen, a 35-year-old man, seeking to establish primary care for himself and his 32-year-old husband, Mr. Ben Carter. They recently moved to the area. During the initial intake, Dr. Reid learns that Mr. Chen and Mr. Carter are legally married and openly discuss their plans for starting a family through adoption in the future. Dr. Reid, citing a personal belief that "traditional family structures" provide the best environment for children and mentioning previous challenging experiences with family dynamics involving same-sex couples in her practice leading to complex legal disputes regarding parental rights, politely declines to accept them as new patients, suggesting they seek care elsewhere, perhaps in a larger urban centre with more diverse healthcare providers. She states her current patient panel is full, although her clinic's online portal still indicates availability. Which of the following ethical principles or legal obligations has Dr. Reid most directly violated?