Options Market Makers are still allowed to sell short. It's the "Madoff exemption" to the prohibition against naked short selling. You read this forum, right? It's come up before on occasion...
All a short seller has to do is buy a short Put, and that forces the Market Maker who sold the Put to immediately turn around and sell shares to remain delta neutral.
You are a kid running with scissors if you don't understand how Option hedging works, and how hedge funds and shortzes exploit the Market Maker's exexmption to continue short selling AFTER the Uptick Rule is in effect.
This is what happened today. The Uptick Rule triggered @ $1,046.64 (which is -10% from Yesterday's Close). Shortzes had no problem continuing to drive the SP down afterward.