Section 153.5 - Who shall apply(a)Applicant. Any person proposing to site, construct, or operate facilities which are to be used for the export of natural gas from the United States to a foreign country or for the import of natural gas from a foreign country or to amend an existing Commission authorization, including the modification of existing authorized facilities, shall file with the Commission an application for authorization therefor under subpart B of this part and section 3 of the Natural Gas Act.(b)Cross-reference. Any person applying under paragraph (a) of this section to construct facilities at the borders of the United States and Canada or Mexico must also simultaneously apply for a Presidential Permit under subpart C of this part.