Hourly Employee Vacation – Contract template

Hi There,
I am creating Employment contract for hourly paid employee (part time and Full time) and need assistance on how to formulate the vacation entitlement 
Hourly employees accrue vacation pay in every pay that is processed through payroll 
If an employee would like to cash that $ they need to request to management 
Could you please share with me some employment contact to see how to formulate that properly?

Thank you,