Date Time What to do if you have been underpaid Employees who believe they have been underpaid can make an underpayment complaint to Wageline, which is part of Private Sector Labour Relations at the Department of Mines, Industry Regulation and Safety. State system employees WA award pay rates and leave entitlements; minimum pay rates and leave entitlements under the Minimum Conditions of Employment Act; and long service leave entitlements under the Long Service Leave Act. National system employees For national system employees, Private Sector Labour Relations industrial inspectors can investigate alleged underpayments of long service leave under the Long Service Leave Act.