(a) Renegotiation or adjustment of the initial interest rate provided in the note or the credit instrument, upward or downward, which may increase or decrease the amount of periodic payments or may extend or shorten the term of the credit instrument, or both;
(b) An increase in the underlying obligation secured by the credit instrument during any part of the term of the credit instrument as a result of deferment of all or a portion of the interest payments and the addition of such payments to the outstanding balance of the obligation;
(c) Execution of new notes at designated intervals during the term of the credit instrument that reflect changes made pursuant to paragraph (a) or (b) of this subsection;
(d) Extension of the term of the credit instrument;
(e) Substitution of a note if there is no increase in the principal amount to be paid under the note;
(f) Modification of periodic payments required under the note if there is no increase in the principal amount due under the note; or
(g) Advances made under ORS 86.155.
(2) As used in this section, the addition of accrued interest to the principal amount of the underlying obligation is not an increase in the principal amount.
(3) As used in this section, "credit instrument" includes a mortgage, a line of credit instrument, a deed of trust and a contract for sale of real property. [1981 c.304 §2; 1987 c.716 §2; 1991 c.246 §1; 2001 c.20 §1]