(1) the person is deemed to be a member of a particular partnership at the end of a particular fiscal period of the particular partnership and that particular fiscal period is deemed to end in the person’s particular taxation year in which ends the fiscal period of the interposed partnership of which the person is directly a member, if(a) the particular fiscal period is that which ends in the fiscal period (in this section referred to as the “interposed fiscal period”) of the interposed partnership that is a member of the particular partnership at the end of that particular fiscal period, and
(b) the person is a member, or deemed to be a member under this paragraph, of the interposed partnership described in subparagraph a at the end of the interposed partnership’s fiscal period in which the particular fiscal period ends; and
(2) for the purpose of determining the person’s share in an amount in respect of the given partnership for the given fiscal period, the agreed proportion in respect of the person for that fiscal period of the given partnership is deemed to be equal to the product obtained by multiplying the agreed proportion in respect of the person for the interposed fiscal period of the interposed partnership of which the person is directly a member, by(a) if there is only one interposed partnership, the agreed proportion in respect of the interposed partnership for the given partnership’s given fiscal period, or
(b) if there is more than one interposed partnership, the result obtained by multiplying together all proportions each of which is the agreed proportion in respect of an interposed partnership for the particular fiscal period of the particular partnership referred to in paragraph 1 of which the interposed partnership is a member at the end of that particular fiscal period.