Kim and Kanye’s new mansion — the one they spent years renovating and finally moved into a few weeks ago — has its first house rule … NO JEWELRY ALLOWED!!!

Our Kardashian sources tell us Kim decided to put the policy in place at the Hidden Hills home because she doesn’t want it to be a target for thieves. In essence, she’s throwing up her version of the bat signal … NOTHING TO STEAL HERE!

We’re told Kim’s huge collection of bling worth millions is being stored elsewhere — under constant supervision — with very elaborate security measures to get to it. And despite the lack of jewelry at their new place … we’re told armed security’s still on guard 24/7.

The move makes it clear … the trauma of the Paris robbery is still on Kim and Kanye’s minds. Especially with a new baby due this month.

As we’ve reported … there have also been a string of celebrity burglaries over the past year, with ‘Real Housewives’ Kyle Richards being the most recent victim.

Lesson learned for Kim.