The British decision, announced on Tuesday, allows Huawei to supply up to 35% of the gear in non-core parts of the network.
Spark's initial 5G proposal, submitted to the General Communications Security Bureau, New Zealand's main spy agency, in 2018, was to use only Huawei equipment. This proposal was knocked back.
Last November, Spark announced that it would maintain a multi-vendor approach, with Nokia, Samsung and Huawei on the roster of preferred radio access network (RAN) suppliers.
The company plans to have its first 5G mobile service in place by 1 July, with Nokia for the RAN and Cisco and Ericsson equipment for the core.
A Spark spokesperson told iTWire in response to a query: "We are interested to see the UK's approach to allowing Huawei's participation in the UK's 5G mobile networks, while still managing security risks. We will continue to engage with our government to understand its views, while also continuing to pursue our multi-vendor strategy, which we announced last year.
"We already gained government approval for our initial 5G rollout last year using Nokia equipment. For our upcoming 5G rollouts, we will work through the approval process in due course with Nokia and our other RAN vendors, Samsung and Huawei, prior to any deployment of their equipment."
Vodafone NZ launched 5G in December in Auckland, Wellington, Christchurch and Queenstown, using Nokia as its main technology vendor.
Another provider, 2degrees, has yet to announce its 5G schedule. The company has been using Huawei for both the RAN and core in its 4G network.
The GSCB has been given sole authority to decide the vendors who can supply 5G equipment to New Zealand telcos.