Nope and I agree with Mad, it's just an effort for mgmt to take back control o the store. I'm also with her that I find it easier to just do what they ask than fight the small suff. I guess if I know I'm going to be chilly, I'll go to the long sleeve undershirt or long sleeve navy shirts. I have a 3rd shift stocker who went to wearing her white hoodie UNDER her polo so it's LIKE an undershirt-LOL!
If they're saying L&G and cartpushers can't wear coats or sweaters of any kind then yeah, I guess they'd be in conflict of policy in trying to enforce it and I may take it up the chain of command. But in your original question you mentioned something about "ommitting lawn & garden etc etc..." so I thought they were just trying to enforce the no sweaters thing with sales associates and cashiers and such. That, to me, would be something enforcable and not a change or HO mandate but rather enforcement of an existing policy.
I'm pretty sure front-end cashiers are not allowed sweaters or jackets of any kind (just the undershirts) per policy. I'd have to go look it up again. But doorgreeters are in the category with cartpushers and L&G associates. Not sure about CSMs.