"Restrictions on shooting and off-road use are in effect for all areas within the valley" is a direct quote from the LVMPD press release. I apologize for their poor wording. https://www.lvmpd.com/en-us/Press Releases/PO 063 04-06-20.pdf
So they have a press release for something that has been known for years.
Makes perfect sense. I guess releasing that fancy looking letter somehow gets people to pull their head out of their asses.