24 CFR §220.810

1. (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 and such default continues for a period of 30 days, the note or security instrument shall be considered in default for the purposes of §§ 220.800 et seq.
2. (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 right under the note or security instrument and accelerated the debt.
3. (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.