Rivers was arrested in November last year following a series of armed offenders squad follow-ups across Whangārei, including roadblocks on Station Rd in Kamo, and searches in and around Mander Park.
He is charged with using a firearm against a law enforcement officer, two counts of unlawfully carrying/possessing a firearm, driving while disqualified, failing to stop for police.
Police have withdrawn one charge of unlawful possession of a pistol.
His alleged co-offender Renee Dunn, 40, has also pleaded not guilty and elected a jury trial. She is on bail. Dunn is facing one charge of unlawful possession of a weapon and another of unlawful possession of ammunition rounds.
Gang members due in court
Two Black Power members netted in a police operation in Whangārei are due back in court in June.
Hiko Komene, 24, and 32-year-old Israel Orani - faced joint firearms charges related to a cut-down .22 calibre rifle and a bag containing 47 rounds of ammunition. Both men were charged separately with resisting arrest. The arrests were the outcome of a police operation in Whananaki and in Otangarei, Whangārei.
Both are in custody and will re-appear on June 3 and 15 respectively.
Mapping coastal hazards
New coastal hazard maps have been released by the Northland Regional Council.
The latest maps show areas at risk of coastal erosion and flooding.
For coastal erosion, mapping is available for 11 new sites (bringing the number of local site assessments across the region to 41) while for coastal flooding, mapping has been extended along the entire regional coastline.
The updated mapping is available online at nrc.govt.nz/coastalmaps