At the moment, our Graduate School has a separate Honor Code and Code of Conduct. These refer to the university code as the main policy document, but our faculty felt that there were unique situations inherent to graduate research that required more policy guidance. Also, we have a separate process for adjudicating alleged Honor Code and Code of Conduct infractions. Certain infractions involving possible research misconduct may also have other stakeholders involved (for example, in a School of Medicine the research office may be involved if the infraction affects NIH funding). Hope this helps.