I want to know the answer to the following question:
When did the Federal District receive more power?
All the background I'm provided with is that "In the 1990s, this autonomy was further expanded and, starting from 1997, residents can directly elect the head of government of the Federal District and the representatives of a unicameral Legislative Assembly (which succeeded the previous Assembly) by popular vote.". Is that enough to answer the question?
Answer: no