These are employee wages paid for all regular hours worked, not including additional hours worked at higher rates of pay. Most employees that are on a base pay are exempted from free labor laws that govern overtime compensation; as well as being expected from such laws, base pay workers do not receive overtime pay if they work  more than the minimum hours required by their employer. 

The Fair Work Act 2009 indicates the base rate of pay cannot include additional loadings, monetary allowances (e.g. dinner allowance), overtime or penalty rates, incentive-based bonuses, or other separately identifiable amounts paid to the employee.