As it becomes compulsory from September for secondary school children to study the English Baccalaureate (EBacc) core subjects of English, maths, science, a language and history or geography, Pullman insisted that arts subjects are also essential to education.
The DRG system was initiated in Germany on a voluntary basis in 2003 and became compulsory from 2004 onwards.
From next year, languages will become compulsory for older children in England's primary schools.
As happened with seat belts and airbags, electronic stability control which prevents skids though automated braking has just become compulsory for new cars in America and will be in Europe from 2014.When this happens, such gadgetry becomes just another manufacturing cost.
Aboriginals received the franchise in 1962, though voting did not become compulsory for them until 1984.
The government has ordered coding become compulsory for every child aged 5-16 years old.
With the deterioration of the environment, environmental technology could become compulsory for energy producers.
"It will become compulsory for all unit trusts that can be sold across European borders," he adds.
The registration procedure in the Danish Cancer Registry, which had relied on voluntary notification of incident cancer cases from 1943, became compulsory from 1987 (Storm, 1991).
