(a) If the borrower fails to make any payments due under or provided to be paid by the terms of the note or security instrument, the note shall be considered in default for the purposes of this subpart.

(b) The failure to perform any other covenant under the note or security instrument shall be considered a default, provided the lender, because of such default, has exercised its rights under the note or security instrument and accelerated the debt.

(c) If such defaults as defined in paragraphs (a) and (b) of this section continue for a period of 30 days, the lender shall be entitled to receive the benefits of insurance hereinafter provided.