Aggregation of transactions.
(iv) Aggregation of transactions. The combined effect of multiple contemporaneous transactions, consisting either of multiple PCTs, or of one or more PCT and one or more other transactions in connection with a CSA that are not governed by this section (such as transactions involving cross operating contributions or make-or-sell rights), may require evaluation in accordance with the principles of aggregation described in 1.482-1(f)(2)(i). In such cases, it may be that the multiple transactions are reasonably anticipated, as of the date of the PCT(s), to be so interrelated that the method that provides the most reliable measure of an arm's length charge is a method under this section applied on an aggregate basis for the PCT(s) and other transactions. A section 482 adjustment may be made by comparing the aggregate arm's length charge so determined to the aggregate payments actually made for the multiple transactions. In such a case, it generally will not be necessary to allocate separately the aggregate arm's length charge as between various PCTs or as between PCTs and such other transactions. However, such an allocation may be necessary for other purposes, such as applying paragraph (i)(6) (Periodic adjustments) of this section. An aggregate determination of the arm's length charge for multiple transactions will often yield a payment for a controlled participant that is equal to the aggregate value of the platform contributions and other resources, capabilities, and rights covered by the multiple transactions multiplied by that controlled participant's RAB share. Because RAB shares only include benefits from cost shared intangibles, the reliability of an aggregate determination of payments for multiple transactions may be reduced to the extent that it includes transactions covering resources, capabilities, and rights for which the controlled participants' expected benefit shares differ substantially from their RAB shares.