Noth­ing in this Arti­cle shall be deemed to lim­it the own­er, occu­pant or lessee of a pub­lic place or a place of employ­ment to fur­ther pro­hib­it smok­ing by des­ig­nat­ing out­door areas not sub­ject to the restric­tions in this Arti­cle as a place where smok­ing is also pro­hib­it­ed, pro­vid­ed that the own­er, occu­pant or lessee shall cause signs to be post­ed at appro­pri­ate loca­tions advis­ing per­sons that smok­ing is pro­hib­it­ed with­in the des­ig­nat­ed out­door area.