His press conferences became compulsory viewing.
Crash helmets became compulsory in Benin two months ago.
When the pasteurization of milk became compulsory, Malta fever almost disappeared from the island.
In 2012, when judo became compulsory in many schools, the ministry published revamped safety guidelines.
Registration of birth, marriage, and death first became compulsory in England in 1837.
Australia took the initiative in the early 1990s when cycle helmets became compulsory in every state.
Attendance became compulsory in 1920 for native children between the ages of 7 and 16.
Eight years of schooling became compulsory beginning in 1948, although this plan was not realized until 1962.
Military force was used, rubber collecting became compulsory, and defaulters were barbarically punished by having their limbs amputated.
In 1886 free public education became compulsory; public schools, a museum, and a national library were founded.
However, with the rise of Christianity, and 600 years later of Islam, covering of the female form became compulsory.
