It would be enforced by tightening United Nations control over Iraqi oil revenues.
In Kaduna, the possibility that it would be enforced led to deadly clashes between Christians and Muslims.
While the change is intended to apply only to cars of the 2001 model year and newer, it's unclear how it would be enforced at the pump.
At issue in the negotiations are the size of the companies that would be affected, the mechanism by which it would be enforced and when the mandate would take effect.
When it did, it contained a compromise: although the quota would be permanently applied to parties' internal elections, it would be enforced only as an experiment for this month's general election and next year's local elections.
Should the new measure become Israeli law, it is not clear how it would be enforced or if the prohibition would extend to non-citizens living under Israeli rule, like Palestinians in the occupied West Bank, who also frequently compare Israeli soldiers to Nazis.
Rather than explaining how such a ban accorded with the religious freedoms guaranteed under the Constitution, or how it would be enforced (most passports don't list a person's religion), Trump sought to wrap himself in the mantle of Franklin Delano Roosevelt, who, during the Second World War, authorized the detention of German, Italian, and Japanese people.
There had been calls for a total HGV ban in Storrington, but Horsham Council said this had proved challenging in how it would be enforced.
Dhoni's continued presence means hope remains, while England may have to assess the fitness of their bowlers overnight to decide if it would be enforced.
Lord Hall also stated that his new £150,000 cap on severance pay was "very real" and that it would be enforced on all of the 300 staff it applied to, despite around 20 senior managers disagreeing with the cap.
