Sentence:  Under P. L. 113 , 78 th Congress , the Federal Government assumed responsibility for 100 % of necessary State expenditures in connection with administration and the counseling and placement of the disabled , and for 50 % of the necessary costs of providing clients with rehabilitation case <WSD>services</WSD> . 
Meaning of the word marked with <WSD> tags:  performance of duties or provision of space and equipment helpful to others