s 47C Section 47A : specified periods and extensions
(1) A period specified under section 47A(1) or (2) ...— (a) shall begin no earlier than the end of the day when the resolution or direction specifying it is passed or given; (b) shall begin no later than the end of the period of one month beginning with that day; and (c) shall not be longer than 12 months. (2) The power under section 47A(3) ... to extend a period is a power to extend it until the end of such period of not more than 12 months beginning with the date of the resolution, ..., by which the power is exercised as the resolution ... may provide.