(emphasis added)§ 39-17-1359
(a) An individual, corporation, business entity or local, state or federal government entity or agent thereof is authorized to prohibit the possession of weapons by any person otherwise authorized by §39-17-1351 §39-17-1360, at meetings conducted by, or on property owned, operated, or managed or under the control of such individual, corporation, business entity or government entity. Notice of such prohibition shall be posted. Posted notices shall be displayed in prominent locations, including all entrances primarily used by persons entering the building, portion of the building or buildings where weapon possession is prohibited. If the possession of weapons is also prohibited on the premises of any such property as well as within the confines of a building located on such property, the notice shall be posted at all entrances to the premises that are primarily used by persons entering the property. The notice shall be in English but a notice may also be posted in any language used by patrons, customers or persons who frequent the place where weapon possession is prohibited. In addition to the sign, notice may also include the international circle and slash symbolizing the prohibition of the item within the circle. The sign shall be of a size that is plainly visible to the average person entering the building, premises or property and shall contain language substantially similar to the following:
Pursuant to § 39-17-1359, the owner/operator of this property has banned weapons on this property, or within this building or this portion of this building. Failure to comply with this prohibition is punishable as a criminal act under state law and may subject the violator to a fine of not more than five hundred dollars ($500).
It's very clear that a posting in TN must meet certain requirements to carry the force of law.
The posting at the Ripley's Aquarium, for example, does NOT meet these requirements.