€�give individual schools the right to opt out of the local educational authority”( -- Newsweek)
“给予每一学校有脱离地方教育行政体系的权利”( -- 新闻周刊)

The database would not include a person's name unless he opted in.
除非决定参加，否则数据库将不录入姓名。

The treaty gives any country the right to opt out of a single currency.
条约赋予任何国家退出单一货币的权利。