(1) An agreement modifying a contract within this article needs no consideration to be binding.
A signed agreement which excludes modification or rescission except by a signedwriting cannot be otherwise modified or rescinded, but except as between merchants such a requirement on a form supplied by the merchant must be separately signed by the other party.
The requirements of the statute of frauds section of this article (section 4-2-201) mustbe satisfied if the contract as modified is within its provisions.
Although an attempt at modification or rescission does not satisfy the requirementsof subsection (2) or (3) of this section, it can operate as a waiver.
A party who has made a waiver affecting an executory portion of the contract mayretract the waiver by reasonable notification received by the other party that strict performance will be required of any term waived, unless the retraction would be unjust in view of a material change of position in reliance on the waiver.
Source: L. 65: p. 1305, § 1. C.R.S. 1963: § 155-2-209.