During the former president's tenure, smoking in public spaces became prohibited by law.
ご質問ありがとうございます。
「前大統領は任期中に公共の場を禁煙にする[法律](https://eikaiwa.dmm.com/uknow/questions/32690/)を作った」は英語で「During the former president's tenure, smoking in public spaces became prohibited by law.」という風に言えます。
ご参考になれば幸いです。
"The former president passed a law banning smoking in public areas during their term."
"The former president passed a law banning smoking in public areas during their term."
"the former president" 「前大統領は」
"passed a law" 「法律を作った」
"banning smoking in public areas" 「公共の場を禁煙にする」
"during their term" 「任期中に」
[これも](https://eikaiwa.dmm.com/uknow/questions/39655/)役に立つかもしれませんので是非クリックしてください。
アメリカ合衆国 
オーストラリア 
