In the state of Nevada, civil liability for sellers of alcohol applying to customers 21 years of age or older is:

In Nevada, civil liability for sellers of alcohol regarding customers who are 21 years of age or older is non-existent. This means that businesses or individuals who sell alcohol to legal-aged drinkers do not face civil legal consequences simply for providing alcohol to someone who is of legal drinking age.

This legal framework is important, as it differentiates between the responsibilities of sellers when dealing with adults compared to minors. While sellers must still adhere to other regulations related to responsible serving practices, the absence of civil liability for adult customers suggests that as long as proper identification is verified and legal drinking age is confirmed, the seller is protected from lawsuits resulting from the consumption of alcohol by these customers.

On the other hand, options such as 'required by law' or 'state mandated' suggest an obligation that doesn’t apply in this case, since there are no legal repercussions for sellers who sell to adults. The notion of 'strictly enforced' implies that there are consequences for sellers, which is not applicable in this context either. Understanding this distinction is crucial for those involved in alcohol sales and management within the state.