EXHIBIT (8)(a)(3)

AMENDMENT NO. 18 TO PARTICIPATION AGREEMENT

(AIM/INVESCO)

AMENDMENT TO

PARTICIPATION AGREEMENT

The Participation Agreement (the “Agreement”), dated as of May 1, 1998, by and among AIM Variable Insurance Funds, a Delaware trust (“AVIF”); A I M Distributors, Inc., a Delaware corporation (“AIM”); Transamerica Life Insurance Company (formerly, PFL Life Insurance Company), an Iowa life insurance company (“LIFE COMPANY”) and Transamerica Capital, Inc. (replacing AFSG SECURITIES CORPORATION by Amendment and Novation), is hereby amended as follows:

WHEREAS, on March 31, 2008, A I M Distributors, Inc. was renamed Invesco Aim Distributors, Inc. All references to A I M Distributors, Inc. will hereby be deleted and replaced with Invesco Aim Distributors, Inc.; and

Schedule A of the Agreement is hereby deleted in its entirety and replaced with the following:

SCHEDULE A

FUNDS AVAILABLE UNDER THE CONTRACTS

Series I and II shares

AIM V.I. Basic Balanced Fund AIM V.I. Basic Value Fund AIM V.I. Capital Appreciation Fund AIM V.I. Capital Development Fund AIM V.I. Core Equity Fund AIM V.I. Diversified Income Fund AIM V.I. Dynamics Fund AIM V.I. Financial Services Fund AIM V.I. Global Health Care Fund AIM V.I. Global Real Estate Fund AIM V.I. Government Securities Fund AIM V.I. High Yield Fund AIM V.I. International Growth Fund AIM V.I. Large Cap Growth Fund AIM V.I. Leisure Fund AIM V.I. Mid Cap Core Equity Fund AIM V.I. Money Market Fund AIM V.I. PowerShares ETF Allocation Fund AIM V.I. Small Cap Equity Fund AIM V.I. Technology Fund AIM V.I. Utilities Fund

SEPARATE ACCOUNTS UTILIZING THE FUNDS

• Retirement Builder Variable Annuity Account

• Separate Account VA A

• PFL Corporate Account One (1940 Act Exclusion)

• Separate Account VA B

• Separate Account VA C

• Separate Account VA D

• Separate Account VA F

• Separate Account VA J

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SEPARATE ACCOUNTS UTILIZING THE FUNDS (CONT’D)

• Separate Account VA K

• Separate Account VA L

• Separate Account VA P

• Separate Account VA R

• Separate Account VA S

• Separate Account VA W

• Separate Account VA Y

• Separate Account VA Z

• Separate Account VA-5

• Separate Account VUL A

• Transamerica Corporate Separate Account Sixteen

• Variable Life Account A of TLIC

CONTRACTS FUNDED BY THE SEPARATE ACCOUNTS

• Retirement Income Builder II Variable Annuity

• Portfolio Select Variable Annuity

• The Atlas Portfolio Builder Variable Annuity

• Advantage V, Variable Universal Life Policy (1933 Act Exempt)

• Advantage X

• Transamerica Landmark Variable Annuity

• Transamerica Freedom Variable Annuity

• Transamerica Extra Variable Annuity

• Transamerica Access Variable Annuity

• Flexible Premium Variable Annuity – C under the marketing name “Transamerica Principium”

• Premier Asset Builder Variable Annuity

• Immediate Income Builder II

• Retirement Income Builder – BAI Variable Annuity under the marketing name “Retirement Income Builder IV”

• Transamerica Preferred Advantage Variable Annuity

• Flexible Premium Variable Annuity – A under the marketing names: “Transamerica Opportunity Builder” and “Transamerica Traditions”

• Flexible Premium Variable Annuity – D under the marketing name “Huntington Allstar Select”

• Flexible Premium Variable Annuity – G under the marketing name “Transamerica Liberty”

• Flexible Premium Variable Annuity – J under the marketing name “Transamerica Axiom”

• Flexible Premium Variable Annuity – K under the marketing name “Transamerica Investor Choice Annuity”

• Distinct Asset^SM Variable Annuity

• Legacy Builder Plus VUL

• Variable Protector

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All other terms and provisions of the Agreement not amended herein shall remain in full force and effect.

Effective date: June 1, 2009

AIM VARIABLE INSURANCE FUNDS

By:	/s/ John M. Zerr
Name:	John M. Zerr
Title:	Senior Vice President

A I M DISTRIBUTORS, INC.

By:	/s/ John S. Cooper
Name:	John S. Cooper
Title:	President

TRANSAMERICA LIFE INSURANCE COMPANY

By:	/s/ Arthur D. Woods
Name:	Arthur D. Woods
Title:	Vice President

TRANSAMERICA CAPITAL, INC.

By:	/s/ Brenda L. Smith
Name:	Brenda L. Smith
Title:	Assistant Vice President

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