A municipality does not possess a discretion to condone non-compliance with a peremptory requirement in tender conditions. A tender that does not comply with a peremptory requirement is non-responsive and cannot be awarded, regardless of whether the non-compliance might be considered trivial or minor, unless the requirement itself is immaterial, unreasonable or unconstitutional. Where both competing tenders fail to comply with a peremptory requirement, both must be declared non-responsive and the award of a tender to either tenderer must be set aside.