The reason the Shot Show is a prohibited area and signage has force of law is because it's a "public" building owned by the Las Vegas Convention and Visitors Authority (i.e. a political subdivision within the State of Nevada) under NRS 202.3673.
Signage for private businesses have no weight of law other than simple trespass in NV for open or concealed carry. However open carry in a casino is frowned upon because it scares away the anti liberals who are spending money and keeping our property and sales taxes down. Casino carry on non Indian Reservation land falls under know the law; don't ask, don't tell. On Indian Reservations it depends on what the tribal law is that day. You won't be punished for a State crime other than simple trespass, but the Reservation can impound your firearm. Because of Federal law, you can not sue an Indian Reservation without Congressional approval so either you need to jump through the tribe's hoops to get it back or just write it off.
However, keep in mind that an additional prohibited area was added last legislative session, child care facilities. If a casino has a child care facility on site, under the letter of the law you are in violation of NRS 202.265 and NRS 202.3673 which are gross misdemeanor and misdemeanors respectively. The child care facility prohibition under the language of the statute is extended to the entire premises, including the parcel of land the child care facility is on and vehicles specifically owned and used by the child care facility.
Signage for private businesses have no weight of law other than simple trespass in NV for open or concealed carry. However open carry in a casino is frowned upon because it scares away the anti liberals who are spending money and keeping our property and sales taxes down. Casino carry on non Indian Reservation land falls under know the law; don't ask, don't tell. On Indian Reservations it depends on what the tribal law is that day. You won't be punished for a State crime other than simple trespass, but the Reservation can impound your firearm. Because of Federal law, you can not sue an Indian Reservation without Congressional approval so either you need to jump through the tribe's hoops to get it back or just write it off.
However, keep in mind that an additional prohibited area was added last legislative session, child care facilities. If a casino has a child care facility on site, under the letter of the law you are in violation of NRS 202.265 and NRS 202.3673 which are gross misdemeanor and misdemeanors respectively. The child care facility prohibition under the language of the statute is extended to the entire premises, including the parcel of land the child care facility is on and vehicles specifically owned and used by the child care facility.