Section 131B. At the discretion of the Social Security Administration, the commissioner shall enter into an agreement with the Social Security Administration, under which the commonwealth may administer the program of state supplementary payments authorized in section 1 of chapter 118A, or the Social Security Administration may, on behalf of the commonwealth, administer the program of state supplementary payments for the blind authorized in section 131. This agreement shall satisfy the requirements under section 3 of said chapter 118A which the Social Security Administration shall execute for the administration of state supplementary payments for the aged and disabled.