constitutes a permanent establishment only if it lasts, or the activities of the rig or ship lasts, for more than 12 months. (ii) Determination of 12-month period For purposes of clause (i), the period over which a building site or construction or installation project of a person lasts shall include any period of more than 30 days during which such person does not carry on activities at such building site or construction or installation project but connected activities are carried on at such building site or construction or installation project by one or more connected persons. (C) Habitual exercise of contract authority treated as permanent establishment Notwithstanding subparagraphs (A) and (B), where a person (other than an agent of an independent status to whom subparagraph (D)(ii) applies) is acting on behalf of a trade or business of a qualified resident of Taiwan and has and habitually exercises an authority to conclude contracts that are binding on the trade or business, that trade or business shall be deemed to have a permanent establishment in the country in which such authority is exercised in respect of any activities that the person undertakes for the trade or business, unless the activities of such person are limited to those described in subparagraph (D)(i) that, if exercised through a fixed place of business, would not make this fixed place of business a permanent establishment under the provisions of that subparagraph. (D) Exclusions (i) In general Notwithstanding subparagraphs (A) and (B), the term permanent establishment shall not include— (I) the use of facilities solely for the purpose of storage, display, or delivery of goods or merchandise belonging to the trade or business, (II) the maintenance of a stock of goods or merchandise belonging to the trade or business solely for the purpose of storage, display, or delivery, (III) the maintenance of a stock of goods or merchandise belonging to the trade or business solely for the purpose of processing by another trade or business, (IV) the