A drainage rate shall—
be made by the drainage board for an internal drainage district in writing under the common seal of the board; and
be treated as made on the date on which a resolution is passed by the board authorising their seal to be affixed to the rate.
A drainage rate made by a drainage board shall not be valid unless notice of it stating-
the amount of the rate;
the amounts of the board's expenses to be raised by means of drainage rates and special levies, respectively; and
the date on which the rate was made,
is given by the board in accordance with subsection (3) below within ten days of its being made.
A notice under subsection (2) above of a rate made by the drainage board for any internal drainage district may, as the board think fit, either—
be affixed in one or more public or conspicuous places in that district; or
be published in some other way .
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Every drainage rate shall be in the prescribed form.