If not inconsistent with the requirements of an applicable statute or regulation, a failure to satisfy the requirements or limitations imposed under Sections 18-1A-20 through 18-1A-30, inclusive:
(1) Is waived by the failure of the property owner, in the exercise of reasonable diligence, to object to or seek relief based upon noncompliance; and
(2) May be waived by written agreement between the property owner and the condemnor.