Woke attempting to block woman's rights activist entering NZ

[king1]

The last paragraph in that article says 

For differences in sex development (DSD) athletes, the new regulations will require to reduce their testosterone levels below a limit of 2.5 nmol/L for a minimum of 24 months to compete internationally in the female category in any event, not just the events that were restricted (400m to 1600m) under the previous regulations.

So I wonder if that is possible for the trans athletes ?  are they able to manipulate their testosterone levels?  If so then it's not really a ban, but setting defined limits, which can only be a good thing...