The protection of it's population is the principal responsibility of any government.

The President's management style is to put the principal responsibility for policy review and implementation on the shoulders of his advisors.

We explained that his group's principal responsibility was the Peacemaker launch.

The operating system's principal responsibility is in controlling the execution of processes.

If he sold a few extra bottles, so much the better, but pushing the product was not his principal responsibility.

General Roberts and his men obviously take principal responsibility.

The acceptance test is a principal responsibility of the systems architect.

"We decided that our principal responsibility to the safety of visitors and collections must be paramount."

The nominations ran into difficulty because women still accept principal responsibility for child care.

The acceptance test always remains the principal responsibility of the architect(s).