Proration will be done on a reasonable basis in proportion to the relative economic value, as of the date of the PCT, reasonably anticipated to be derived from the platform contribution by the CSA Activity as compared to the value reasonably anticipated to be derived from the platform contribution by other business activities. In the case of an aggregate valuation done under the principles of paragraph (g)(2)(iv) of this section that addresses payment for resources, capabilities, or rights used for business activities other than the CSA Activity (for example, the right to exploit an existing intangible without further development), the proration of the aggregate payments may have to reflect the economic value attributable to such resources, capabilities, or rights as well. For purposes of the best method rule under § 1.482-1(c), the reliability of the analysis under a method that requires proration pursuant to this paragraph is reduced relative to the reliability of an analysis under a method that does not require proration ...

Some transfer pricing methods employed to determine the arm’s length amount of the PCT Payments do so by considering the overall value of the platform contributions as opposed to, for example, the value of the anticipated use of the platform contributions in the CSA Activity. Such a transfer pricing method is consistent with the presumption that the platform contribution is exclusive (that is, that the resources, capabilities or rights that are the subject of a platform contribution are reasonably anticipated to contribute only to the CSA Activity). See paragraph (c)(2)(i) (Terms of platform contributions – Presumed to be exclusive) of this section. The PCT Payments determined under such transfer pricing method may have to be prorated if the controlled participants can rebut the presumption that the platform contribution is exclusive to the satisfaction of the Commissioner as provided in paragraph (c)(2)(ii) of this section. In the case of a platform contribution that also contributes to lines of business of a PCT Payor that are not reasonably anticipated to involve exploitation of the cost shared intangibles, the need for explicit proration may in some cases be avoided through aggregation of transactions. See paragraph (g)(2)(iv) of this section (Aggregation of transactions) ...

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