def get_audit_ccs(assessment):
  """Returns audit CCs regarding assessment.

  Args:
    assessment: An instance of Assessment model.

  Returns:
    List of audit ccs
  """
  audit_issuetracker_issue = assessment.audit.issuetracker_issue
  if audit_issuetracker_issue is not None and audit_issuetracker_issue.cc_list:
    audit_ccs = audit_issuetracker_issue.cc_list.split(",")
  else:
    audit_ccs = []

  return audit_ccs