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The Institution issues a series of Guidance Notes, each of which enlarges upon and amplifies the particular requirements of a part of the 17th edition "Wiring Regulations". Each of these guides is extensively cross-referenced to the Regulations, thus providing convenient and ready access. Some Guidance Notes contain information not included in the 17th Edition but which was included in earlier editions of the "IEE Wiring Regulations". All of the Guidance Notes contain references to other relevant sources of information.