"We are conducting foot patrols around the areas of the licensed premises and carparks enforcing liquor bans, underage drinking and false identification.
"Police encourage hosts to register parties with us so we can offer advice and assist with any issues that may arise."
A special licence must be obtained where alcohol is sold or supplied.
"We also encourage parents and caregivers to familiarise themselves with the [rules] when considering supplying alcohol."
Alcohol cannot be supplied to under 18s unless: the person supplying the alcohol is the parent or legal guardian and the alcohol is supplied in a responsible manner, or if the person supplying the alcohol has the express consent of the young person's parent or legal guardian and the alcohol is supplied in a responsible manner.
"We aim for a safe and happy summer in Eastern where the sale, supply and consumption of alcohol is undertaken responsibly and any harm is minimised. "
Bar manager Annabel Caldwell from The Gin Trap in Napier, said anyone underage would be ill-advised to even try to get in to a bar.
"Don't try it, it's just not going to work. Everybody in all the other bars are well trained up on it - they won't be able to get away with it.
"Obviously over summertime, because we are busy, we have more staff who are able to keep an eye on all our patrons. Our staff are well trained to ID anyone they think is under 25. It doesn't matter if they think they look over 18, if they don't look under 25 all the staff will ID them."
Miss Caldwell said additional security staff would also be employed at weekends and on band nights.
Historically Hawke's Bay has a higher rate of hazardous drinking consumption rates amongst the region's 15-24 year age group. Young males of that age are also statistically significantly higher than national rates. However, women here had lower rates than nationally.
Responsible drinking champion Matt Claridge, chief executive of the Tomorrow Project that leads the Cheers! social change campaign, said parents had the biggest impact on their teenagers' drinking habits - and it was vital they took the lead, model better drinking behaviour and regularly talk to them about drinking, especially heading into the post-exam holiday season.
"This is a critical group of New Zealanders who we know are drinking alcohol despite being under the legal drinking age.
"Our research shows that parents are still the biggest influencers on their children's drinking behaviour and many are falling short when it comes to leading good behaviour and openly discussing rules and expectations."