890.7. For the purposes of this Part, other than this section, where a retirement compensation arrangement is part of a plan or arrangement under which amounts not related to the retirement compensation arrangement are payable or provided, the following rules apply:(a) the retirement compensation arrangement is deemed to be a separate arrangement independent of other parts of the plan or arrangement of which it is a part; and
(b) subject to section 47.14, amounts paid out of or under the plan or arrangement are deemed to have first been paid out of the retirement compensation arrangement unless a provision in the plan or arrangement otherwise provides.