; and (II) notwithstanding subparagraph (A), shall receive partial cancellation, in accordance with subparagraph (A)(i)(II)(bb), for the first of such 2 years. (C) Change in subject taught In any case where a teacher first qualifies for loan cancellation under subparagraph (A)(i)(II) and then, in a subsequent year, teaches in a full-time qualifying teaching position in a subject described in subparagraph (A)(i)(I), the percentage of loan forgiveness provided to the teacher for each academic year of full-time teaching in such a subject shall be 15 percent, until the teacher qualifies for cancellation in the seventh year under subparagraph (A)(ii)(II). (3) Eligibility provisions (A) Certification A borrower who desires to participate in the repayment plan under this subsection shall submit to the Secretary an employer certification, as required by the Secretary, of the employment dates for the qualifying service. (B) Ineligibility for double benefits (i) In general No borrower may, for the same service, receive a reduction of loan obligations under both this subsection and section 428J, 428K, 428L, or 460. (ii) Ineligibility of education award No borrower may count any payments made from an education award received under subtitle D of title I of the National and Community Service Act of 1990 ( 42 U.S.C. 12601 et seq.) toward the payments required under paragraph (1). (C) Continued eligibility A teacher who is employed, for consecutive years (excluding a documented medical leave of absence or military service), in a qualifying teaching position at a school that meets the requirements of paragraph (6)(C)(i) for a school year but fails to meet such requirements in subsequent years, shall be deemed to be in a qualifying teaching position, for purposes of this subsection, for all of the consecutive subsequent years during which the teacher remains at the school. (4) State certification (A) State responsibilities Each State educational agency that receives assistance under part A of title I of the Elementary and