Hey Nancy,
In Modesto, before smoke free was a thing in California, a client agreed with my suggestion to go smoke free in a couple of buildings. Once we started with those buildings, it was easier to just go smoke free in whole community. There were no addenda forms so we created. These were B properties and we expected blow back. Quite the contrary.
Here's what we learned - if you take away an area to smoke, you MUST give another area because smokers are going to smoke so they will stand outside the building annoying residents and tossing the butts.
Extreme fines are necessary and the leases stated they would be evicted for non compliance on the second fine.
Back to the area - our best area was partially covered by a carport, next to the enclosed dumpster area with provided butt disposal containers and a picnic table. Tried to make it nice since it WAS by the dumpster but we couldn't take a parking space.
Don't be worried - you will be so delighted with the ease of your residents adjustment!

We are doing the same, switching from designated areas only to smoke free. We gave everyone notice about 6 months ahead of time and implemented October 1. We have started off giving reminders if we see people smoking or we get a complaint. From there we will begin issuing violation notices and starting the process toward moving out if there is a continuing problem. We were concerned about loosing tenants, but most everyone has been very positive and respectful.

I attached two documents we used in two cities that don't allow smoking, also you will need to post signs at all entrances to the community.

My email below didn't take the attachments I was sending.

Is this a city ordinance? If so start with that and quote the ordinance. I have property in Sunnyvale and San Mateo, CA, both have a smoke free ordinance.

I attached what we used. We do not offer a designated area. Also, you need to post signs, you can order online through Peachtree or other sign companies.

We have had 2 buildings that are smoke free for 19 years. I would like to know how you handled it for a whole property.

Thanks
Phyllis Mardian

NO SMOKING LEASE ADDENDUM in red book