A private sector firm lacks critical decision-making authority in audits that it conducts on behalf of Delaware, officials said Thursday as they wrapped up briefing in a renewed effort to dismiss a constitutional challenge to the state’s system for collecting unclaimed property.

Attorneys for Delaware’s finance secretary said that Kelmar Associates, a Boston-based independent auditor, only conducted the reviews according to Delaware statute and under the guidance of the state escheator, who ultimately decides whether companies are complying with Delaware unclaimed property laws.