The requirements change every year, so that by 2009 any bus built before 1990 will have to be retired.

The plan was first drafted late in 1937, then revised as the military situation and requirements changed.

By 2009, this requirement will change to college or university education in health and safety.

With the British settling down in the seat of power, their requirements changed.

These requirements do not change under the new home-grown standard.

That requirement did not change under the revised state law.

Those requirements would not change under the Republican welfare bill.

Sometimes requirements change as a greater understanding of the project components unfolds over time.

Legal requirements to practice respiratory therapy have also dramatically changed.

The requirements often change and a lot can depend on your nationality too.