18(1)Procedural arrangements made by the Office under paragraph 8 shall include arrangements under which a member, employee or committee-member who has a financial or other personal interest which is likely to influence his performance of a particular function is obliged—
(a)to declare the interest, and
(b)to withdraw from the performance of the function to the relevant extent.
(2)Procedural arrangements made by the Office under paragraph 8 shall include arrangements under which a member, employee or committee-member who has a financial or other personal interest which is relevant to a particular function but does not fall under sub-paragraph (1) is obliged—
(a)to declare the interest, and
(b)unless the members of the Office direct otherwise, to withdraw from the performance of the function to the relevant extent.