Things have changed a little of late. Athletics NZ are encouraging more masters to register with centres not just as Masters only.
Registration with a club through Athletics NZ automatically qualifies as Master NZ, But is more expensive.
For a Masters ONLY registration you can contact your local Masters.
Southland Masters Contacts;
Lester Laughton (President) 021 888 145 Email
Lee Grieve (Secertary) 03 249 4357 Email
ATHLETICS SOUTHLAND Inc
Surrey Park, Invercargill, New Zealand