Spell it out since the emoluments clause is apparently too vague to be enforced.
You must show your taxes, you may not run a business, you may not profit from the office, you must comply with oversight and subpoenas and so on.
All those gentlemans agreements and honor system norms that have been taken for granted all these years must now be spelled out definitively. We can never take the chance that a person like this ever takes office again.
What else should be added to the list?