Helmets are compulsory the bike leg.
Only the marking of first preference is compulsory a ballot paper to be valid.
Schooling is compulsory Norway.
This is compulsory the completion of the Diploma.
No subject is compulsory this level.

1. Primary and secondary schooling is compulsory children aged 6 to 16, with the majority attending from the age of 5.
2. Education is compulsory Western Australia between the ages of six and seventeen, corresponding to primary and secondary school.
3. A common VAT system is compulsory the member states of the European Union.
4. The FIVB changed the rules in 1999 (with the changes being compulsory 2000) to use the current scoring system
5. It is compulsory brush your teeth before bed.