Voters will be given two ballot papers.
The green ballot paper is to elect a local candidate for the House of Representatives. While, the white ballot paper is for electing a senator from their own state or territory.
To cast a formal Senate vote, you can choose to vote either above the line or below the line.
Above the line
Number at least 6 boxes for parties or groups in the order of your choice (with number 1 as your first choice).
Below the line
Number at least 12 boxes for individual candidates in the order of your choice (with number 1 as your first choice).
You can number as many additional boxes as you choose when voting either above the line (i.e. more than six boxes) or below the line (i.e. more than twelve boxes).
Ballot papers must be marked according to the rules for voting so that they do not create informal votes. Ballot papers cannot be counted if they are informal.
Polling officials at the polling place are available to assist voters in completing their ballot paper. If the voter makes a mistake on a ballot paper they may return it to the polling official who issued it and receive a fresh one.
Source: AEC

Source: AEC