First of all, I would like to complete my earlier answer by saying that we only intervene when the gift is actually disclosed. There are several disclosures each month, but I'm convinced there could be gifts that are not always disclosed. Of course, we cannot do anything if they are not being disclosed.
If disclosed, we suggest that the gift be returned. Sometimes we suggest that the gift be reimbursed as well when it's not actually possible to return it because it was a show or a public event that has already taken place.
I have no power to order. We simply provide advice to people who disclose a gift. In the example of a trip for instance, the advice may be given that somebody should reimburse the cost of the trip, but I don't have any tools in the act to actually force the execution of my advice.