AMENDMENT NO. 13 PARTICIPATION AGREEMENT

Exhibit 8(b)(1)

Amendment No. 13 to Participation Agreement (AIM)

AMENDMENT NO. 13

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 AFSG SECURITIES CORPORATION, a Pennsylvania corporation (“UNDERWRITER”), is hereby amended as follows:

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

SCHEDULE A

FUNDS AVAILABLE UNDER THE CONTRACTS

AIM V.I. Aggressive Growth Fund AIM V.I. Basic Balanced Fund AIM V.I. Basic Value Fund AIM V.I. Blue Chip Fund AIM V.I. Capital Appreciation Fund AIM V.I. Capital Development Fund AIM V.I. Core Equity Fund AIM V.I. Demographic Trends Fund AIM V.I. Diversified Income Fund AIM V.I. Government Securities Fund AIM V.I. Growth Fund AIM V.I. High Yield Fund AIM V.I. International Growth Fund AIM V.I. Large Cap Growth Fund AIM V.I. Mid Cap Core Equity Fund AIM V.I. Money Market Fund AIM V.I. Premier Equity Fund AIM V.I. Real Estate Fund AIM V.I. Small Cap Equity Fund AIM V.I. Core Stock Fund AIM V.I. Dynamics Fund AIM V.I. Financial Services Fund AIM V.I. Global Health Care Fund AIM V.I. Leisure Fund AIM V.I. Small Company Growth Fund AIM V.I. Technology Fund AIM V.I. Total Return Fund AIM V.I. Utilities Fund

SEPARATE ACCOUNTS UTILIZING THE FUNDS

• Retirement Builder Variable Annuity Account

• Legacy Builder Variable Life Separate Account

• PFL Variable Life Account A

• 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 I

• Separate Account VA J

• Separate Account VA-K

• Separate Account VA L

• Separate Account VA P

• Retirement Builder Variable Annuity Account

• Separate Account VA Q

2

• Separate Account VA R

• Separate Account VA S

• Separate Account VA X

CONTRACTS FUNDED BY THE SEPARATE ACCOUNTS

• Transamerica Life Insurance Company Policy Form No. AV288 101 95 796 under marketing names:

“Retirement Income Builder II Variable Annuity” and “Portfolio Select Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. WL851 136 58 699 under the marketing name “Legacy Builder Plus”

• Transamerica Life Insurance Company Policy Form No. APUL0600 699 under the marketing name “Variable Protector”

• Transamerica Life Insurance Company Policy Form No. AV337 101 100397 under the marketing name “The Atlas Portfolio Builder Variable Annuity” Advantage V, Variable Universal Life Policy (1933 Act Exempt) – WL 712 136 84 798 (may vary by state)

• Transamerica Life Insurance Company Policy Form No. AV720 000 000 000 under the marketing name “Transamerica Landmark Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV400 101 107 198 under the marketing name “Transamerica Freedom Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV710 101 147 102 under the marketing name “Transamerica EXTRA Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV474 101 122 1099 under the marketing name “Transamerica Access Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV288 101 95 796 under the marketing name “Premier Asset Builder Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV288 101 95 796 under the marketing name “Principal-Plus Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AVI 200 1 0100 under the marketing name “Immediate Income Builder II”

• Transamerica Life Insurance Company policy Form No. AV721 101 149 1001 under the marketing name “Retirement Income Builder – BAI Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV721 101 149 1001 under the marketing name “Transamerica Preferred Advantage Variable Annuity”

• Transamerica Life Insurance Company Policy Form No. AV721 101 149 1001 under the marketing names: “Transamerica Opportunity Builder” and Transamerica Traditions

• Transamerica Life Insurance Company Policy Form No. AV288 101 95 796 under the marketing name Portfolio Select Variable Annuity

• Transamerica Life Insurance Company Policy Form No. AV864 101 165 103

• Transamerica Life Insurance Company Policy Form No. AV1025 101 178 903

• Transamerica Life Insurance Company Policy Form No. AV865 101 167 103 under the marketing name “Huntington Allstar Select”

• Transamerica Life Insurance Company Policy Form No. AV1025 101 178 903 under the marketing name “Transamerica Principium Advisor”

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

3

Effective date: September 1, 2005

				AIM VARIABLE INSURANCE FUNDS
Attest:		/s/ Xxx X. Xxxxxxxx		By:		/s/ Xxxxxx X. Xxxxxx
Name:		Xxx X. Xxxxxxxx		Name:		Xxxxxx X. Xxxxxx
Title:		Assistant Secretary		Title:		President
				A I M DISTRIBUTORS, INC.
Attest:		/s/ P. Xxxxxxxx Xxxxx		By:		/s/ Xxxx X. Needles
Name:		P. Xxxxxxxx Xxxxx		Name:		Xxxx X. Needles
Title:		Assistant Secretary		Title:		President
				TRANSAMERICA LIFE INSURANCE COMPANY
Attest:		/s/ Xxxxx Xxxxxxxxx		By:		/s/ Xxxxxxxxx X. Xxxxxxx
Name:		Xxxxx Xxxxxxxxx		Name:		Xxxxxxxxx X. Xxxxxxx
Title:		Compliance Coordinator		Title:		Assistant Secretary
				AFSG SECURITIES CORPORATION
Attest:		/s/ Xxxxx Xxxxxxxxx		By:		/s/ Xxxxxxxxx X. Xxxxxxx
Name:		Xxxxx Xxxxxxxxx		Name:		Xxxxxxxxx X. Xxxxxxx
Title:		Compliance Coordinator		Title:		Assistant Vice President and Assistant Secretary

4