From the briefing submitted on behalf of Miss Keeton by the ADF. If you can't accept a non-disordered part of your client's life, you're not eligible to counsel them. If the faculty of ASU can indicate that Miss Keeton would seek to change a homosexual client's orientation (as implied above and with reported discussions advocating for conversion therapy referenced earlier in the briefing), they'll win as that behavior is not in line with the ACA Code of Ethics. Miss Keeton's case appears to hinge upon the idea that the ACA code does not apply to non-members and that the ASU student handbook and program expectations never explicitly refer to the ACA Code as a guide. However, the handbook, as quoted in the briefing, does have a statement about students needing to adhere to ethics as determined by the faculty.
Additionally, if the intro course she took is anything worth taking, the ACA Code has been covered and defined as the guiding document for all ethical concerns. Given that she's in a CACREP Certified Program (the highest accreditation available for counselor education programs), it was covered and set as the guiding document for ethical counseling.