How to read what is here

Read this as background, not as a recommendation. For a decision with real consequences, a qualified adviser is the right source.

Accuracy of the information

The material here is prepared with care, but no promise is made that it is complete, current, or free of error. Subjects like this move, and a page can fall behind what it describes.

Where links lead

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Keeping this current

This is not a permanent text. The current position is whatever this page says.

Getting in touch

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