Store it indoors if you can. Use a separate "storage" fuel tank cap that is sealed. Run the carburetor dry of fuel before rolling it indoors as well.
My Honda CT70 has a special cap, factory issued, that lets you open or close the vent for storage. That's where I got this idea from.
Hopefully the powers that be will allow you to do this.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."