Hi,
congratulations first an welcome to NZ.
The fee for the APC covers the administration cost - therefore, there is no pro rata option.
The Physiotherapy Board of New Zealand > Frequently Asked Questions About Annual Practising Certificates
The Ultrasound license used to be a seperate clause and was included and mentioned on the APC. This is no longer done this way - everyone with registration is permitted to perform Ultrasound. My last APC with the Ultrasound license noted was from 2004/2005. So, I presume, the application form which you have been send has never been updated. Hillarious!
Regards,
Fyzzio