Commonwealth Consolidated RegulationsFor section 231 of the Act, the basic periodic rate of pay for a piece rate employee is worked out in accordance with the formula:

where:
"BPR" is the employee's basic periodic rate of pay, expressed as an hourly rate of pay.
"TA" is the total amount earned by the employee at the employee's basic piece rate of pay during the relevant period.
"TH" is the total hours worked by the employee during the relevant period.
the relevant period is:
(a) for an employee who was continuously employed by the employer for a period of 12 months or more immediately before the basic periodic rate of pay is to be worked out -- the 12 months before the rate is to be worked out; or
(b) for an employee who was continuously employed by the employer for a period less than 12 months immediately before the rate of pay is to be worked out -- that period.
Note The Act contains the following relevant definitions:
(a) piece rate employee -- section 228;
(b) basic piece rate of pay -- section 178.