; and ; (vii) by inserting after subparagraph (G) the following: (H) such principal amount as the Secretary may prescribe if made for the purpose of financing the construction of an accessory dwelling unit. ; and (viii) in the matter preceding paragraph (2)— (I) by striking regulation and inserting notice ; (II) by striking increase and inserting set ; (III) by striking (ii), (C), (D), and (E) and inserting through (H) ; (IV) by inserting , or as necessary to achieve the goals of the Federal Housing Administration, periodically reset the dollar amount limitations in subparagraphs (A) through (H) based on justification and methodology set forth in advance by regulation before the period at the end; and (V) by adjusting the margins appropriately; (B) in paragraph (3), by striking exceeds— and all that follows through the period at the end and inserting exceeds such period of time as determined by the Secretary, not to exceed 30 years. ; (C) by striking paragraph (9) and inserting the following: (9) Annual indexing of certain dollar amount limitations The Secretary shall develop or choose 1 or more methods of indexing in order to annually set the loan limits established in paragraph (1), based on data the Secretary determines is appropriate for purposes of this section. ; and (D) in paragraph (11), by striking lease— and all that follows through the period at the end and inserting unless such lease meets the terms and conditions established by the Secretary . (b) Deadline for development or choice of new index