What is an action that servers can take to help meet their legal duty regarding sale and service of liquor?

Question: What is an action that servers can take to help meet their legal duty regarding sale and service of liquor?
  remind patrons by signal or announcement of the limited time frame for consuming liquor
  ensure patrons leave the premises within 60 minutes of completing the liquor service
  offer to provide food at reduced prices to intoxicated patrons to help them sober up
   allow patrons to enter outside the permitted hours for liquor service but do not serve any liquor during those times

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remind patrons by signal or announcement of the limited time frame for consuming liquor