Final answer:
The ethical test likely used by a manager enforcing a new dating policy that also affects themselves is the Equal treatment test, which ensures consistency and fairness for all employees.
Step-by-step explanation:
If a manager has decided to enforce a new policy restricting dating in the office and has also decided that the policy will affect them equally, the ethical test most likely employed is the Equal treatment test. This test ensures that ethical decisions don't favor any one group over another and are applied fairly and consistently throughout the organization. By applying the new policy to themselves as well, the manager is adhering to ethical standards that advocate for treating others as you would like to be treated, which is another aspect of the Golden rule test but the emphasis here is on equal application of policy.