I tmight be law now dependent upon where you live.
If made law, the Family Entertainment Protection Act would be a "a prohibition against any business for selling or renting a Mature, Adults-Only, or Ratings Pending game to a person who is younger than seventeen." It would punish violators with unspecified fines, though it did not specify if the clerk who sold the game or the retailer where said clerk worked would be punished. "This provision is not aimed at punishing retailers who act in good faith to enforce the Entertainment Software Ratings Board (ESRB) system," read a statement from Clinton's office.
While the retail part of the bill is similar to laws recently passed in Michigan, Illinois, and California, the Family Entertainment Protection Act goes much farther. It would authorize "the FTC to conduct an annual, random audit of retailers to determine how easy it is for young people to purchase Mature and Adults Only video games and report the findings to Congress." These findings would be part of a larger annual analysis of ESRB game ratings. "This analysis will help ensure that the ESRB ratings system accurately reflects the content in each game and that the ratings system does not change significantly over time," read Clinton's statement.
The bill would also allow private citizens to file complaints with the FTC's Bureau of Consumer Protection (BCP) "if they find content to be misleading or deceptive." The BCP would issue an annual report on said complaints to Congress as part of the aforementioned annual review.
As justification for the act, Clinton's office claims that "video game content is getting more and more violent and sexually explicit." It cites the recent 10th Annual MediaWise Video and Computer Game Report Card, issued by the National Institute on Media and the Family, which gave the industry a "D+" and said the ESRB was "beyond repair." Also, the study's secret shopper program found that 42 percent of the time boys under 17 were able to buy M-rated games from retailers, with underage girls succeeding 46 percent of the time.
Plus I should add that a retail store has the right to choose who to sell to. If that's the manager's policy then he has the right to enforce it.