UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Information to be included in Statements filed pursuant to Rules

13d-1(b), (c) and (d) and amendments thereto filed pursuant to

Rule 13d-2(b)

(Amendment No.2)

Blackrock NJ Investment Quality Muni Trust

(Name of Issuer)

Auction Preferred Stock

(Title of Class of Securities)

09247C206

(CUSIP Number(s))

July 31, 2012

(Date of Event That Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

x Rule 13d-1(b)

¨ Rule 13d-1(c)

¨ Rule 13d-1(d)

The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP NO(s).		Page 2 of [5]


1.	Names of Reporting Persons UBS AG, for the benefit and on behalf of UBS Securities LLC and UBS Financial Services Inc., two-wholly owned subsidiaries of UBS AG to which UBS AG has delegated portions of its performance obligations with respect to the Auction Rate Securities Rights issued by UBS AG to certain clients and pursuant to which the securities reported herein have been purchased from such clients.
2.	Check the Appropriate Box if a Member of a Group a ¨ b ¨
3.	SEC USE ONLY
4.	Citizenship or Place of Organization Switzerland
Number of Shares Beneficially Owned by Each Reporting Person With:		5.	Sole Voting Power 0
		6.	Shared Voting Power 0
		7.	Sole Dispositive Power 0
		8.	Shared Dispositive Power 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 0
10.	Check if the Aggregate Amount in Row 9 Excludes Certain Shares ¨
11.	Percent of Class Represented by Amount in Row 9 0%
12.	Type of Reporting Person BK


CUSIP NO(s).		Page 3 of [5]

Item 1(a)

Name of Issuer

Blackrock NJ Investment Quality Muni Trust

Item 1(b)

Address of Issuer’s Principal Executive Offices:

Blackrock NJ Investment Quality Muni Trust

100 Bellevue Parkway

Wilmington, DE 19809

Item 2(a)

Name of Person Filing:

UBS AG

Item 2(b)

Address of Principal Business Office:

UBS AG

Bahnhofstrasse 45

PO Box CH-8021

Zurich, Switzerland

Item 2(c)

Citizenship or Place of Organization:

Switzerland

Item 2(d)

Title of Class of Securities

Auction Preferred Stock

Item 2(e)

CUSIP Number(s):

09247C206

This response lists the CUSIP numbers assigned to every series of auction preferred securities issued by the Issuer, and not redeemed as of January 31, 2009, including series in which UBS AG may not have an ownership position.

Item 3.

Type of Person Filing:

UBS AG is classified as a Bank as defined in section 3(a)(6) of the Securities Act or 1933 pursuant to no-action relief granted by the staff of the Securities and Exchange Commission.


CUSIP NO(s).		Page 4 of [5]

Item 4 (a)-(c)(iv).

Ownership:

Items 5-11 of the cover page and Item 2(e) above are incorporated by reference in our response to this Item 4.

Item 5.

Ownership of Five Percent or Less of a Class:

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following x.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person:

Not applicable

Item 7.

Identification and Classification of the Subsidiary That Acquired the Security Being Reported on By the Parent Holding Company:

This statement on Schedule 13G is being filed by UBS AG, for the benefit and on behalf of UBS Securities LLC and UBS Financial Services Inc., two wholly owned subsidiaries of UBS AG to which UBS AG has delegated portions of its performance obligations with respect to the Auction Rate Securities Rights issued by UBS AG to certain clients and pursuant to which the securities reported herein have been purchased from such clients

Item 8.

Identification and Classification of Members of the Group

Not Applicable

Item 9

Notice of Dissolution of Group:

Not Applicable

Item 10.

Certification:

By signing below, the undersigned certify that, to the best of their knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.


CUSIP NO(s).		Page 5 of [5]

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

By:

/s/ Anthony DeFilippis

Executive Director

Central Compliance


By:		/s/William Chandler
		Managing Director

Date: August 9, 2012

BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC SC 13G/A