The state department of human services is hereby authorized to provide such medical, diagnostic, physical restoration, training, and other rehabilitation services as may be needed to enable disabled individuals, including those suffering from acquired traumatic brain damage, to attain the maximum degree of self care. The powers herein delegated and authorized for the state department of human services shall be in addition to those previously authorized by any other law. This provision shall become effective when and if federal grant-in-aid funds are authorized and appropriated by Congress for participation in the cost of independent living rehabilitation services for disabled persons in order to enable them to attain the maximum degree of self care. In the event the Congress of the United States, by legislative act or appropriation, authorizes the establishment of such a state-federal grant-in-aid program, the state department of human services shall be authorized to co-operate with whatever federal agency is directed to administer the federal aspects of the program and to comply with such requirements and conditions as may be established and the receipt and disbursement of federal grant-in-aid funds which may be made available to the state of Rhode Island in carrying out the program. Provided however, with respect to those persons suffering from acquired traumatic brain damage, the department of human services shall not have any jurisdiction over the housing of said persons.