In New South Wales, South Australia, South East Queensland and Victoria, regulators apply what's called the Default Market Offer or Victorian Default Offer as it's called in VIC. It's also known as the reference price.
The reference price is set in these states to assist you with comparing energy plans. The offers you see on a provider's website are market offers. A market offer can be set at an amount below or above the reference price. The reference price is the maximum amount a provider can charge a customer on a standing offer plan. You're put on a standing offer automatically by a provider once your market offer ends.