Complex sentence: Since 1 July 2002, the minimum contribution has been set based on an employee's ordinary time earnings and is thus not payable on overtime rates but is payable on remuneration items such as bonuses, commissions, shift loading and casual loadings.
Split into simpler sentences: Since 1 July 2002, the minimum contribution has been set based on an employee's ordinary time earnings and is thus not payable on overtime rates. It is payable on remuneration items such as bonuses, commissions, shift loading and casual loadings.