How-to-votes

It might be legal to hand out how-to-votes where only a "1" for your group appears above the line.
Some of the sample how-to-votes on the Electoral Commission website are filled out that way.
See below for one of the samples.

Even if it's legal, your group might want to show additional preferences.
Voters often follow the how-to-vote exactly.
If they only vote for your group, and you aren't elected, their vote is lost.
If you suggest a second preference to another group you like, you could help that group get elected.
Even if you are elected, there is usually an excess of votes, which can flow to another group if you give them your preference.

You might also want to include a suggestion to voters that they number all the squares above the line as they see fit.
If they voted for you, they will probably give their preferences to other groups that you would like to support.

I would suggest checking the facts for yourself to make sure my interpretation is correct.
You can download the
How to vote card examples and
How to vote cards and posters – Questions and answers and
Handbook for Parties, Groups, Candidates and Scrutineers at Local Government Elections
from the Electoral Commission website.

You can also talk to the Returning Officer, Andrew Frater, on 0417 289 828.

Sample from Electoral Commission website

Groups with group voting squares: Group application Select option 1 or also option 2 for candidate preference selection. Applications made by or for a group showing preferences above-the-line must show a first preference for that goup in their group voting square. The how-to-vote may show additional preferences for other groups using the gorup voting squares biginning with the number "2". Select option 3, 4, and 5 or option 6 for authorisation of material: All electoral material (including how-to-vote cards) for distribution on election day must show the name and address of the person authorising the material - this may be a PO box. The material must also show the name and street address of the printer of the material. If the same person is authorising and printing the material then the address shown must be a street address. Source: http://elections.nsw.gov.au/__data/assets/pdf_file/0005/48704/How_to_vote_instructions.pdf (PDF 390 KB)