391 4. (a) The Board of Governors shall designate a senior officer of the executive organ to serve as the Acting Director General whenever the Director General is absent or is unable to discharge his duties, or if the office of Director General should become vacant. The Acting Director General shall have the capacity to exercise all the powers of the Director General pursuant to this Treaty and the Operating Treaty. In the event of a vacancy, the Acting Director General -shall serve in that capacity until the assumption of office bya Director Genera~l appointed and confirmed, as expeditiously as possible, in accordance with paragraph 2 (c) of this Article. (b) The Director General may delegate such of his powers to other officers in the executive organ as may be necessary to meet appropriate requirements. ATcEX 49RIGHTS AND OBLIGATIONS OF MEMBERS "1. The Parties shall exercise their rights and meet their obligations under the Treaty in -a manner fully consistent with and in furtherance of the principles stated in the Preamble and other provisions of this Treaty. "2. All Parties shall be allowed to attend and participate in all conferences and meetings in which they are entitled to be represented in accordance with any provisions of this Treaty or the Operating Treaty as well as in any other meeting called by or held under the auspices of INTERSEA, in accordance with the arrangements made by INTERSEA for such meetings regardless of -where they may take place. The executive organ shall ensure that arrangements with the host Party for each such conference or meeting shall include a provision for the admission to thehost country and sojourn for the duration of such conference or meeting, -of representatives of all Parties entitled to attend. "3. The Parties agree to refrain from either individually or jointly, the construction or establishment of an interoceanic canal through Central America, 'and to prohibit any person or entity within the Jurisdiction of a Party to do some, unless said construction or establishment is done jointly through the JNTEIRSEA organization. "IARIcLE XI C4INTERSEA HEADQUARTERS, PRIVLEGES, EXEMPTIONS, IM3MNITIES "11. The headquarters of INTERSEA shall be in the host country. "12. Each Party other than the hoste'ountry shall grant in accordance with the Protocol referred to in this paragraph and the host country shall grant in accordance with the Headquarters Agreement referred to in this paragraph, the appropriate privileges, exemptions and immunities to INTIERSEA, to its officers, and to those categories of its employees specified in such Protocol and Headquarters Agreement, to Parties and representatives of Parties, and to persons participatnsz in arbitration proceedings. In particular, each Party shall grant to these individuals immunity from legal process in respect of ats done or words written or spoken in the exercise of their functions