A procedure using classical "wet chemistry" must exist in the older dairy literature, which I don't have available.

A similar procedure already exists in the House.

Where a procedures exists, it should be used.

However, two procedures existed by which the individual could become a British subject with some of the rights of citizenship.

Where uniform procedures exist, it is easier to impose centralised control.

A similar procedure existed in the theme of Samos as well.

A compulsory procedure for consultation between airport management bodies and users must exist.

We cannot simply say that once such a procedure exists, it may not be departed from at any time or in any way.

The experience of countries where such a procedure exists has shown that it works very well.

Several different procedures exist and the user can choose among them.