The phrase "practice a policy" is correct and usable in written English.
You can use it when you want to talk about someone executing or enacting a rule or course of action. For example: "The company practices a strict policy on safety protocols."
The controversial stop-and-frisk policy was struck down in 2013 by a federal judge, who called the practice a "policy of indirect racial profiling".
Well after the final vote in the French election, they won't just talk about it, they will put into practice a policy of growth if we win".
Both are efforts to put into practice a policy senior officials had announced in June, to encourage immigration agents to use prosecutorial discretion when deciding whether to pursue a deportation.
In practice, a policy engine should only effect actions on components that authorise it to do so, which models the real-world in the sense that only those who 'own' an entity can control it.
Among American abortion rights leaders, many of whom practice a policy-oriented form of activism, she received a round of cautious endorsement but little in the way of financial help.
The United States practices a policy of ambiguity with respect to Israel's nuclear stockpile, neither publicly discussing it nor forcing the Israeli government to acknowledge its existence.
The first paragraph of the story reported that the Senate Caucus on International Narcotics Control "found" indications that the National Football League had at one time practiced a policy of allowing star players to escape punishment from failed drug tests while lower-tier players did not.
An investigation into the National Football League's drug policy by a Senate caucus on drug control found indications that the league at one time practiced a policy of allowing star players to escape punishment from failed drug tests while lower-tier players did not.
He entered Parliament in 1741, one of the "cousinhood" of men interrelated by blood or marriage and further united in their opposition to Sir Robert Walpole, who held power from 1721 to 1742 and practiced a policy of salutary neglect toward the American colonies.
For years, the North Korean government resisted IAEA inspections and practiced a policy of deception.
The Syrian government has practiced a policy of "extermination" against thousands of detainees, and is guilty of other crimes against humanity and war crimes, UN-appointed investigators have found.
