(ix) (a) A statement that the facility has been certified by the Federal certifying authority, together with a copy of such certification, and a copy of the application for certification which was filed with and approved by the Federal certifying authority or (b), if the facility has not been certified by the Federal certifying authority, a statement that application has been made to the proper State certifying authority (see paragraph (c)(2) of § 1.169-2 ) together with a copy of such application and (except in the case of an election to which subparagraph (4) of this paragraph applies) a copy of the application filed or to be filed with the Federal certifying authority. If subdivision (ix)(b) of this subparagraph applies, within 90 days after receipt by the taxpayer, the certification from the Federal certifying authority shall be filed by the taxpayer with the district director, or with the director of the internal revenue service center, with whom the return referred to in this subparagraph was filed.