the agencies will exchange with each other information in their possession which may be of use in establishing or verifying eligibility or benefit amounts under any other such program;

such information shall be made available to assist in the child support program under part D of subchapter IV of this chapter, and to assist the Secretary of Health and Human Services in establishing or verifying eligibility or benefit amounts under subchapters II and XVI of this chapter, but subject to the safeguards and restrictions established by the Secretary of the Treasury with respect to information released pursuant to section 6103( l ) of the Internal Revenue Code of 1986; and

the use of such information shall be targeted to those uses which are most likely to be productive in identifying and preventing ineligibility and incorrect payments, and no State shall be required to use such information to verify the eligibility of all recipients;