Customers who looked under 25 years old and could not produce identification should not be sold alcohol.
"It is important to stress that a full and proper identification check must be carried out, including calculating the [customer's] age," he said.
"This is best practice, and the only sure way to prevent sales to under-age [customers]," Mr Wright said.
"As a community we need to have confidence that licence holders will not sell alcohol to our youth and allow them to drink unsupervised and potentially harmfully."
The consequences of breaching the law were "major", he added, potentially including the suspension of licences to sell alcohol for a number of days.
Sergeant Howard Clement said the results of the operations were poor, given that they had been conducted for more than a decade, alongside education, publicity and enforcement.
"All premises selling or supplying alcohol are aware that we run these types of operations regularly, so should not be surprised that they are being tested," he said.