Section 433.137 - State plan requirements(a) A State plan must provide that the requirements of §§ 433.138 and 433.139 are met for identifying third parties liable for payment of services under the plan and for payment of claims involving third parties.(b) A State plan must provide that- (1) The requirements of §§ 433.145 through 433.148 are met for assignment of rights to benefits, cooperation with the agency in obtaining medical support or payments, and cooperation in identifying and providing information to assist the State in pursuing any liable third parties; and(2) The requirements of §§ 433.151 through 433.154 are met for cooperative agreements and incentive payments for third party collections.(c) The requirements of paragraph (b)(1) of this section relating to assignment of rights to benefits and cooperation in obtaining medical support or payments and paragraph (b)(2) of this section are effective for medical assistance furnished on or after October 1, 1984. The requirements of paragraph (b)(1) of this section relating to cooperation in identifying and providing information to assist the State in pursuing liable third parties are effective for medical assistance furnished on or after July 1, 1986.50 FR 46665, Nov. 12, 1985, as amended at 55 FR 48606, Nov. 21, 1990; 55 FR 52130, Dec. 19, 1990; 60 FR 35502, July 10, 1995