Appropriate amounts due means someone would have to decide what such amount is. Where standard terms of contracts are used the mechanism would be through the normal existing certification process by an independent contract administrator eg superintending officer or architector contract administrator. Even if the contract administrator is not employed independently but is instead an employee of one of the parties, the law would imply that duty to be discharged fairly. And if payment is still not made following the normal certification process or the amount certified is alleged to be ‘unfair’, an adjudicator may be called upon to ‘adjudicate’ on the certificate or other claims.