Guidance was first published in 1973, and it has been periodically revised in the light of experience gained.

They have been periodically revised by the American Heart Association in collaboration with other groups.

The Vienna Document has been revised periodically, and the current version is the 2011 version.

Many style guides are revised periodically to accommodate changes in conventions and usage.

Formal rules for the training of figlie were carefully drafted and periodically revised.

A good example of that is the regimen of the consumer price index, which is periodically revised.

There is nothing unusual about rezoning; the city would calcify if the rules were not periodically revised.

The test, written two decades ago by board officials and periodically revised, is now used by school systems throughout the country to determine English language proficiency.

The best practices within this section are based on current, published information and will be revised periodically as new information is generated from ongoing research projects.

It is periodically revised in response to arguments about usage and usefulness, but new disorders do not represent claims to fresh biological knowledge.