APA GROUP — Major Shareholding Notification 2008

Apr 7, 2008

MEDIA RELEASE

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8 April 2008

• 8 April 2008

The Manager

Company Announcements Office Australian Securities Exchange 4[th] Floor, 20 Bridge Street Sydney NSW 2000

Electronic Lodgement

Dear Sir or Madam

Company Announcement

I attach the following announcement for release to the market:

• Notice of initial substantial holder for MIT

Yours sincerely

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Sandra Dureau

Company Secretary

Page 1

Form 603

Corporations Act 2001 Section 671B

Notice of initial substantial holder

Mariner Pipeline Income Trust and Mariner Pipeline Income Financing Trust

To Company Name/Scheme ARSN 118 961 167 and ARSN 118 961 023 ACN/ARSN

1. Details of substantial holder (1) Australian Pipeline Limited ( APL ) in its capacity as the responsible entity of Name the Australian Pipeline Trust (ARSN 091 678 778) and of the APT Investment Trust (ARSN 115 585 441), APT Pipelines Limited (ACN 009 666 700) and their controlled entities (the “ APA Group ”).

ACN/ARSN (if applicable) 091 344 704 The holder became a substantial holder on 8 April 2008

2. Details of voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in on the date of the substantial holder became a substantial holder are as follows:

Class of securities(4)	Number of securities	Person’s votes(5)	Voting power(6)
Stapled securities comprising one unit in the Mariner Pipeline Income Trust and one unit in the Mariner Pipeline Income FinancingTrust	4,213,049	4,213,049	6.08%

3. Details of relevant interests

The nature of the relevant interest the substantial holder or an associate had in the following voting securities on the date the substantial holder became a substantial holder are as follows:

Holder of relevant interest	Nature of relevant interest(7)	Class and number of securities
APA Group	APA Group acquired a relevant interest in the stapled securities under sections 608(1) and/or 608(3) of the Corporations Act through a transaction that took place on ASX.	4,213,049 stapled securities

4. Details of present registered holders

The persons registered as holders of the securities referred to in paragraph 3 above are as follows:

Holder of relevant interest	Registered holder of securities	Person entitled to be registered as holder(8)	Class and number of securities
APA Group	APL	APL	4,213,049 stapled securities

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5. Consideration

The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four months prior to the day that the substantial holder became a substantial holder is as follows:

Holder of relevant interest	Date of acquisition	Consideration (9)		Class and number of securities
APA Group	8 April 2008	Cash	Non-cash
		$6,767,420.61	Nil	4,213,049

6. Associates

The reasons the persons named in paragraph 3 above are associates of the substantial holder are as follows:

Name and ACN/ARSN(if applicable)	Nature of association
N/A	N/A

7. Addresses

The addresses of persons named in this form are as follows:

Name	Address
APA Group	HSBC Building,Level 19,580 George Street,SydneyNSW 2000

Signature

print name Sandra Dureau Capacity Company Secretary Date sign here 08/ 04 / 2008

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