The legislative scheme
8 Relevantly, the RMP Act provides:
24 Manner of voting
The voting at a referendum shall be by ballot and each elector shall indicate his or her vote:
(a) if the elector approves the proposed law - by writing the word "Yes" in the space provided on the ballot paper; or
(b) if the elector does not approve the proposed law - by writing the word "No" in the space so provided.
Note: See also subsection 93(9) for when votes are formal.
9 Under s 27, each of the Governor-General, the Governor of each State, the Chief Minister of the Australian Capital Territory, the Administrator of the Northern Territory, or a person authorised by him or her, may appoint one person to act as a scrutineer during voting at a referendum at each voting place in respectively the Commonwealth, State or Territory, and the registered officer of a registered political party may appoint persons to act as scrutineers at each polling place.
10 A person voting at a polling booth at a referendum must be given a ballot paper by the presiding officer under s 33(1), and unless otherwise prescribed, shall on receiving a ballot paper retire alone to a voting compartment there "and mark, in private, his or her vote on the ballot paper", fold the paper to conceal the vote and place it in the ballot box (s 35). Every elector has a duty to vote at a referendum by force of s 45(1).
11 Part VI of the RMP Act is headed 'Scrutiny of a referendum'. Importantly, s 89(1) provides:
The result of a referendum shall be ascertained by scrutiny.
12 Mirroring s 27, under s 89(2)-(4A), each of the Governor-General, Governors of the States, Chief Minister and Administrator or a person authorised by him or her and the registered officer of a registered political party may appoint, in the approved form, persons to act as scrutineers at each counting centre.
13 The conduct of the scrutiny is prescribed in s 90(1), which relevantly provides in respect of all ballot papers in s 90(1)(e)(iv):
90 Conduct of scrutiny
(1) The scrutiny of votes at a referendum shall be conducted in accordance with the following provisions:
…
(e) each Assistant Returning Officer shall, in the presence of a polling official and any scrutineers who attend, do the following:
…
(iv) count the number of ballot papers with votes given in favour of the proposed law, the number of ballot papers with votes given not in favour of the proposed law, and the number of informal ballot papers;
14 Under s 91(1), the action at the scrutiny is prescribed, including in s 91(1)(e):
91 Action at scrutiny
(1) At the scrutiny, the following things shall be done:
...
(e) each Divisional Returning Officer shall, forthwith after completing the scrutiny of the ballot papers taken from the ballot-boxes opened by the Officer and making those ballot papers into bundles, prepare a statement showing, in relation to those ballot papers:
(i) the number of votes given in favour of the proposed law;
(ii) the number of votes given not in favour of the proposed law; and
(iii) the number of ballot papers rejected as informal;
15 After completing the scrutiny prescribed in s 91(1)(e), each assistant returning officer must place bundles of the ballot papers that have votes for, against and informal into separate secure containers, together with a statement showing the respective numbers of those votes (s 91(1)(f)). A scrutineer appointed under s 89 can object to a ballot paper being counted as informal under s 92. The officer conducting the scrutiny must make a decision, then mark the ballot paper accordingly as 'admitted' or 'rejected', but the officer can reject any ballot paper as informal without there being any objection.
16 Critically, s 93(1)(b), (8) and (9) provide:
93 Informal ballot papers
(1) A ballot paper is informal if:
...
(b) it has no vote marked on it or the voter's intention is not clear;
…
(8) Effect shall be given to a ballot paper of a voter according to the voter's intention, so far as that intention is clear.
(9) For the purposes of subsection (8):
(a) a voter who writes the letter "Y" in the space provided on the ballot paper is presumed to have intended to approve the proposed law; and
(b) a voter who writes the letter "N" in the space provided on the ballot paper is presumed to have intended to not approve the proposed law.
(emphasis added)
17 Under s 96(3), if the validity of a referendum is disputed after a recount, the High Court may consider any ballot papers that the officer conducting the recount, at the request of a scrutineer, has reserved for the decision of the Australian Electoral Officer of the State or Territory concerned who decided that any reserved ballot paper should have been admitted or rejected. However, the High Court must not order a recount of the whole or any part of the ballot papers unless satisfied that a recount is justified.
18 Part VIII of the RMP Act deals with disputed returns. Under s 100, only the Commonwealth, a State, the Australian Capital Territory or Northern Territory can petition the High Court to dispute the validity of any return or statement showing the voting at a referendum. In addition, s 102 gives the Electoral Commission the right to file a petition. The requirements for a valid petition are set out in s 101. Under s 103, the jurisdiction and powers of the High Court are:
103 Jurisdiction and powers of High Court
(1) The High Court has jurisdiction with respect to matters arising under this Part.
(2) Following the hearing of a petition in relation to a referendum, the High Court may:
(a) declare the referendum to be void;
(b) uphold the petition in whole or in part; or
(c) dismiss the petition.
(3) The High Court may exercise all or any of its powers under this section on such grounds as the Court in its discretion thinks just and sufficient.
(4) Without limiting the generality of this section, the High Court may exercise its powers to declare a referendum void on the ground that contraventions of this Act or the regulations were engaged in in connection with the referendum.
19 The High Court must make its decision on a petition as quickly as is reasonable in the circumstances (s 107AA) and can have regard to rejected ballot papers (s 107A), but, importantly, s 108(1) provides:
108 Immaterial errors not to invalidate referendum
(1) A referendum or a return or statement showing the voting at a referendum shall not be declared void on account of:
(a) any delay in relation to:
(i) the taking of the votes of the electors; or
(ii) the making of any statement or return; or
(b) the absence of any officer or any error of, or omission by, an officer;
that did not affect the result of the referendum.
20 Under Pt XI, headed 'Miscellaneous', s 139 confers jurisdiction on the Federal Court, on the application of the Electoral Commission, to grant an injunction in respect of actual or apprehended contraventions of the RMP Act or any other law of the Commonwealth in its application to referendums. However, s 139(10) provides that the powers conferred on this Court by s 139 are in addition to, and not in derogation of, any other of its powers however conferred.