This part shall remain in effect only until the Director of Finance certifies, in writing, to the Secretary of State that all mortgages made, and all debts incurred, pursuant to this part on or before the date of the approval of the California Housing and Jobs Investment Bond Act (Part 6.1 (commencing with Section 52534)) by the California electorate, have been extinguished, and as of the date of that certification is repealed, unless a later enacted statute, which is enacted before that certification, deletes or extends that date.