She Must Foot the Bill for Her Own Personal Expenses
Every month, the First Lady receives an itemized bill for personal expenses incurred. The First Family must pay for personal items including clothing, toiletries, and food. Staff members are in charge of picking up personal items for the First Family and are paid back at a later date. First Lady Hillary Clinton admitted the Clintons actually left the White House in debt, citing legal fees and other expenses that put them in the red.
This is one of the wilder First Lady rules we know of.