At the entrance to each beach, you'll find a billboard where the beach rules are posted.
No Diving from the Jetties
No Fishing or Spearfishing from the Beach
No Blocking Beach Drains
No Access between 10pm and 7am
No Disturbingly Loud Radios
No Soap, Shampoo or Detergent
No Leaving Debris on the Beach or in the Sea
Don't take a galet!
There are no naturist beaches in Nice; "decent dress" is required but toplessness is permited. Bathing suits are confined to the beach. Strolling the Promenade des Anglais in a bathing suit can earn you a fine of €38.
No sex on the beach. It's considered exhibitionism and incurs a fine of €15,000 or prison.
Drinking alcohol on the beach is prohibited between 8pm and 5am. If you're planning an evening picnic, be most discreet about your bottle of rosé. (Fines between €17 and €38)
Vendors are limited by a web of regulations and thus, sparse. In the summer you can buy the local paper, drinks and coffee on some public beaches but that's it.