199.Subsection (1) gives the Committee on Climate Change the power to do anything that appears to it necessary or appropriate for the purpose of, or in connection with, the carrying out of its functions. Subsections (2) and (3) set out examples to illustrate the scope of the power. Ancillary powers are not freestanding; they may be used only to facilitate the exercise of formal functions. Subsection (4) requires the Committee to have regard to the desirability of involving the public in the exercise of its functions.