text: [ W ] ith regard to enforcement actions at the Presidential level , certifications provided for under section 102 ( d ) ( 3 ) [ now section 716 ( d ) ( 1 ) ( C ) ] are intended to authorize the President and the Director of the Office of Management and Budget to preclude a suit by the Comptroller General against the President and his principal advisers and assistants , and against those units within the Executive Office of the President whose sole function is to advise and assist the President , for information which would not be available under the Freedom of Information Act .
  
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  Certifications provided are intended to unauthorize the President and the Director of the Office of Managemen