Details of the police case against an Auckland school rugby coach facing more than 80 sex charges can now be revealed.

Alosio Taimo is facing 81 charges of sexual offending against young boys and will go on trial in the High Court at Auckland later this year.

He has pleaded not guilty to all charges. 

There were initially nine complainants and 53 charges against Taimo,but after his name was made public more complainants came forward.

Taimo is now accused of sexually assaulting or abusing 16 boys.

All of the boys were under 16 when the alleged offending occurred, with some younger than 12.

The names of all the victims are automatically suppressed by law - and further suppression orders prevent the Herald from naming any schools or sports clubs associated with Taimo's alleged offending. 

Court documents released to the Herald show that some of the charges related to alleged offending in the late 80s and early 90s.

The bulk of the allegations relation to offending between 2003 and 2016. 

The Crown Charge Notice, which outlines each charge against Taimo, also detailed some of the offending.

He allegedly touched young boys, sexually violated them or induced them to touch or perform sexual acts on them.

The alleged offences took place at his home, in his car, in school sports sheds, in a classroom, and in a South Auckland park.

One some occasions the boys were allegedly abused while Taimo was dropping them off at their homes.

On one occasion police allege Taimo touched a young boy's penis while his family was at a birthday party.

A number of the charges against Taimo are representative.

A representative charges is filed when a person is accused of committing multiple offences of the same type in similar circumstances.

The document revealed that the Crown has withdrawn 17 charges against Taimo, including indecencies with boys aged 12-16, indecent acts on young people under 16 and common assault.

The 81 remaining charges include sexual connection, attempted sexual connection, indecent assault, and inducing a child to commit an indecent act.

When Taimo last appeared in the High Court at Auckland he was remanded on bail until his trial date.

That trial is set to run for 10 weeks starting on July 30.