No. 18 Communications between the Houses - dealing with messages (PDF 78KB)

Messages from the House of Representatives

Communications between the two Houses of the Commonwealth Parliament occur through messages from one House to the other. Messages convey business between the Houses and, as a courtesy, information that is relevant to the interests of the other House. Most business conveyed by message relates to legislation.

Some messages require no response or action and are simply reported by the chair "as early as convenient" (see standing order 155). No action arises from such messages. Messages of this kind include:

• notification of agreement to Senate resolutions which have been sent to the House for concurrence;
• notification of changes to the House of Representatives membership of joint committees;
• notification of extensions of time granted by the House for joint committee inquiries referred by the House;
• agreement by the House to Senate bills without amendment; and
• agreement by the House to amendments made by the Senate to House bills.

Other messages seek action from the Senate in response to a request from the House. Messages of this kind include those seeking:

• agreement with resolutions passed by the House, including resolutions for the appointment, or variation to the terms of reference, of joint committees;
• agreement to bills passed by the House;
• agreement to amendments made by the House to Senate bills; and
• reconsideration of amendments made or requested by the Senate to House bills, where the House has disagreed to them

The Senate sends equivalent messages to the House.

When are messages considered?

When a message from the House seeking action by the Senate is reported by the chair, a minister is usually called to move a motion to provide for the consideration of the message either immediately or on the next sitting day. An order of the day for the consideration of the message on the next sitting day is listed on the Notice Paper as government business. Under standing order 65, the government may arrange its business on the Notice Paper to suit its changing priorities (see Guide No. 4—Categories of business). However, a message transmitting a government bill for concurrence is usually dealt with immediately. Preliminary stages in the consideration of the bill by the Senate are completed and debate is usually adjourned after the motion is moved for the bill's second reading (see Guide No. 16—Consideration of legislation).

When a message is received that does not relate to a government initiative, the Senate must determine how it will deal with the business contained in the message. This may require discussions among whips and other senators about who will have the carriage of the business, and motions to give the business a place within the Senate's routine.

Messages dealing with legislation

Negotiations on legislation may require several messages back and forth between the Houses, and may also involve complicated proceedings. For this reason, messages involving the further consideration of legislation are dealt with in committee of the whole which provides a procedurally flexible forum for debating and determining complex matters. The ability for senators to speak several times to a question, which is provided under the procedures for the committee of the whole, is often crucial to the resolution of complex questions about the form and content of legislation.

The special procedures applying to messages concerning legislation returned from the House are contained in standing order 126(1) and standing order 132(1).

The form of the question

As with other messages, the Senate's response to a message concerning negotiations on legislation starts with a motion proposing the terms of the response. This may take one of the following forms:

• That the Senate does not insist on its amendments to which the House has disagreed (or insisted on disagreeing).
• That the Senate insists on its amendments …[unusual].
• That the Senate does not insist on its amendments … and agrees to the amendments made by the House in their place.
• That the Senate does not insist on its amendments…and has made further amendments in their place, in which it seeks the concurrence of the House.

In practice, the government will usually be seeking to resist amendments made in the Senate to which the House has disagreed, so the committee stage begins with a minister moving that the Senate not insist on those amendments.

If a majority of senators votes against the motion, the outcome is a reversal of the original proposition contained in the motion. Thus, if a majority votes against the motion that the Senate does not insist on its amendments, the effect is that the amendments are insisted on. The situation is more complicated where votes are equally divided.

The result of negotiations between the houses can sometimes become complicated. For example, the House may agree to some Senate amendments, but not other amendments, and may suggest alternative amendments in place of the amendments it has disagreed to. In such cases, the form of question to be proposed by a minister will also be complicated.

The scope of further amendments

Messages at the later stages of the legislative process focus on resolving areas of disagreement between the Houses. Therefore, the standing orders do not permit agreed areas of the bill to be revisited, except to make amendments that are relevant to or consequent upon the acceptance, amendment or rejection of a House amendment. However, if the House disagrees with Senate amendments to House bills, the Senate may propose new amendments as an alternative to the rejected ones.

The rules for dealing with bills returned by the House with outstanding areas of disagreement are contained in standing orders 126, 127, 132 and 134 and provide maximum freedom to the Senate to seek agreement with the House. Any actions outside the scope of these rules require the suspension of standing orders that would prevent the action. For example, amendments not relevant to, or consequent upon, the acceptance, amendment or rejection of House amendments may not be moved without a suspension of standing orders (see Guide No. 5— Suspension of standing orders).

How many times can a bill be sent between the Houses?

There is theoretically no limit to the number of times a bill introduced in the House of Representatives can be sent back and forth between the Houses in an effort to reach agreement on it.

The standing orders provide that a bill which originates in the Senate may be returned by the House with outstanding disagreements on a maximum of three occasions. If disagreements are unresolved on the bill's third return from the House, the Senate "shall order the bill to be laid aside, or request a conference" (see standing order 127(1)).

The effect of equally divided votes

Section 23 of the Constitution provides that the President has an ordinary vote, rather than a casting vote, and that questions are determined by a majority of votes. If the votes are equally divided, the question is lost (see Guide No. 3—Voting in the Senate). It is also fundamental in determining the form of question put by the chair during the various stages of the legislative process.

The aim of legislative deliberation is to determine whether a bill, its several component parts and any textual amendments have the support of a majority of the Senate. Thus the questions for each major stage of consideration take the following form:

If the votes are equally divided, the question is lost and, lacking majority support, the bill proceeds no further.

During committee of the whole, detailed consideration of the bill takes place and amendments may be proposed. Amendments take one of two forms:

• proposals to omit clauses; or
• proposals to make textual changes by omitting words, inserting or adding words, or omitting and substituting words.

Where a clause is proposed to be omitted, the question takes the form: That the clause stand as printed.

This question is designed to test whether a majority of the committee is in favour of the clause remaining in the bill. An equally divided vote indicates the absence of a majority in favour; the question is therefore lost and the clause is removed from the bill. Putting the question in an apparently more straightforward way:

would produce a flawed result on an equally divided vote. On such an outcome, the question would be lost and a clause which did not enjoy majority support would remain in the bill. Therefore, this form of the question is not used except where the Senate is requesting the House to make an amendment which the Constitution precludes the Senate from making itself (see Guide No. 16— Consideration of legislation). Such requests must be supported by a majority.

The same principle underlies the form of the question used to determine the Senate's response to messages from the House disagreeing with amendments made by the Senate, which usually takes the following form:

As noted above, if a majority votes against this motion, the effect is that the amendments are insisted upon. However, if the votes are equally divided the effect is that the amendments are not insisted on. The rationale for this outcome is that the equally divided vote indicates that the amendments themselves are now not supported by a majority. If they were, the motion would have been defeated by a majority, possibly the same majority required to make the amendments in the first place. So the bill now proceeds without the amendments. When this occurs, the chair of committees makes a statement explaining the result of the vote.

A further complication arises if an amendment disagreed by the House is an amendment to omit a clause. An equally divided vote on the question that the Senate does not insist on such an amendment means that the clause itself still lacks the support of a majority. Therefore, the amendment to omit the clause is insisted on (see chapter 12 of Odgers' Australian Senate Practice).

Sending messages to the House of Representatives

Messages are automatically generated when actions by the Senate, for example in relation to legislation, require a response to or from the House. The sending of a message to the House may also be built into the terms of a resolution of the Senate.

Standing order 154 provides that any senator may move a motion, without notice and at any time, that any resolution of the Senate be communicated by message to the House. The motion often includes the words "for concurrence" to indicate that the resolution is intended for the consideration of the House.

Need assistance?

For assistance with any of the matters covered by this guide, government senators or their staff should contact the Clerk Assistant (Table), on extension 3020 or ca.table.sen@aph.gov. au; and non-government senators or their staff should contact the Clerk Assistant (Procedure), on extension 3380 or ca.procedure.sen@aph.gov.au.

Last reviewed: June 2025