6(1)Subject to paragraphs 1 to 3 above, levies may be imposed by the Board under section 21 above at such times and at such rates in relation to income of authorised insurance companies liable to the general business levy or to the long term business levy as the Board may determine.
(2)On imposing a levy under section 21 above, the Board shall send notice of the rate of levy to every authorised insurance company which may in the opinion of the Board have had income liable to the levy for the year ending last before the financial year in which the levy is imposed.
(3)A notice under sub-paragraph (2) above shall indicate—
(a)whether the levy is a general business levy or a long term business levy;
(b)what description of income is income liable to the levy in question ; and
(c)the purpose for which the levy is being imposed ;
and shall specify the rate of the levy as a percentage of the income liable to the levy.
(4)A notice required to be sent by sub-paragraph (2) above may be sent by post, and a letter containing such a notice shall be deemed to be properly addressed if it is addressed to the insurance company to which it is sent at its last known place of business in the United Kingdom.