This paragraph (a)(1)(iii) is effective for indebtedness arising after June 30, 1988. See § 1.482-2(a)(3) (26 CFR Part 1 edition revised as of April 1, 1988) for indebtedness arising before July 1, 1988. Except as otherwise provided in paragraphs (a)(1)(iii)(B) through (E) of this section, the period for which interest shall be charged with respect to a bona fide indebtedness between controlled entities begins on the day after the day the indebtedness arises and ends on the day the indebtedness is satisfied (whether by payment, offset, cancellation, or otherwise). Paragraphs (a)(1)(iii)(B) through (E) of this section provide certain alternative periods during which interest is not required to be charged on certain indebtedness. These exceptions apply only to indebtedness described in paragraph (a)(1)(ii)(A)(2) of this section (relating to indebtedness incurred in the ordinary course of business from sales, services, etc., between members of the group) and not evidenced by a written instrument requiring the payment of interest. Such amounts are hereinafter referred to as intercompany trade receivables. The period for which interest is not required to be charged on intercompany trade receivables under this paragraph (a)(1)(iii) is called the interest-free period. In general, an intercompany trade receivable arises at the time economic performance occurs (within the meaning of section 461(h) and the regulations thereunder) with respect to the underlying transaction between controlled entities. For purposes of this paragraph (a)(1)(iii), the term United States includes any possession of the United States, and the term foreign country excludes any possession of the United States ...