1972—Puspan. L. 92–603 substituted “aged and disabled individuals” for “individuals 65 years of age or over”.

Puspan. L. 94–182, title I, § 109, Dec. 31, 1975, 89 Stat. 1053, provided that the Secretary of Health, Education, and Welfare conduct a study on the appropriateness of reimbursement under the insurance program established by this part for services performed by optometrists with respect to the provision of prosthetic lenses for patients with aphakia and submit such study to Congress not later than 4 months after Dec. 31, 1975.

Puspan. L. 90–248, title I, § 141, Jan. 2, 1968, 81 Stat. 855, directed Secretary to conduct a study relating to inclusion under the supplementary medical insurance program under this part of services of additional types of licensed practitioners performing health services in independent practice and submit such study to Congress prior to Jan. 1, 1969.