Prior to assignment you should agree with your employer on your daily or hourly pay rate, payment for statutory holidays and start and finish dates. External information can also be obtained from the careers NZ website.
If you work as a contractor (self-employed) you are required to provide invoices, pay your own tax, ACC levies, and GST if applicable, please consider this in your payment negotiatons. This is most likely what applies to most tour and driver guides.
If you work as an employee then your employer is responsible to pay your tax (PAYE) and provide you with a pay slip. For more details visit the Department of Labour website, and Inland Revenue Department.
Obtain a written contract detailing daily pay rate and hours of work for the tour. More guidelines for Tour and Driver guides can be obtained from the members only section (Login required).