Section 32-11-610 - Subsequent modifications(1) All proceedings may be modified or rescinded wholly or in part by resolution adopted by the board at any time prior to the passage of the resolution adopted pursuant to section 32-11-614 creating the improvement district and authorizing the project.(2) No substantial change in the improvement district, details, preliminary plans, specifications, or estimates shall be made after the first publication or mailing of notice to property owners, whichever occurs first, except for any deletion of a portion of a project and property from the proposed improvement program for the improvement district or for any assessment unit.(3) The engineer, however, has the right to make minor changes in time, plans, and materials entering into the work at any time before its completion.L. 69: p. 789, § 123. C.R.S. 1963: § 89-21-123.