POWER TO ALTER OR EXTEND SCHEMES.

The Board or, as the case may be, the Generating Company may, from time to time, alter or extend a scheme by a supplementary scheme prepared in the manner specified in Sec. 3 1: Provided that any alterations or extensions of a scheme which are, in the opinion of the Board or, as the case may be, the Generating Company, minor in character may be made without preparing a supplementary scheme: