sbowness:

 

From the Human Rights Commission page on the subject:

 

• It is unlawful to refuse to supply goods, services or facilities, or to provide them on less favourable terms or conditions, because of someone’s age. The definition of facilities includes banking, insurance, grants, loans and credit or finance.
• Note: It is not unlawful to provide goods, services or facilities at a reduced rate to people of a particular age.

@sbowness From memory  

You can discriminate with age as long as the 'rest' of the market can get the same bundle, but they may have to pay higher.

The Vodafone X plan is almost a carbon copy of the Prepay Carry Over $19 plan Vodafone has.

Vodafone X is cheaper, but it doesnt have carry over so perhaps this is where the $3 comes from?