Thread: RUC increases

I see on the NZTA web site

Light vehicle owners
If you bought too much RUC and your current RUC licence will last you past 31 July 2023, you'll need to buy a new RUC licence in July. Make sure you enter your current distance reading when you buy the new licence, and the system will credit you back any unused RUC

I don't get it? What is judged as "too much RUCs"? surely if you currently have RUCs and use them up you can just buy new ones later in the year when they run out? Say I buy RUC's before the end of the month at the cheap rate will they credit me back RUC's at the price paid (old rate) or will I get a reduced number of rucs back (charged at new rate).