Complex sentence: Through statutory control, congress can aim to limit bureaucratic drift before it occurs by specifying the bureaucracy's agenda, organization, time and fiscal constraints, and procedures while leaving little discretion up to the bureaucracies.
Split into simpler sentences: Through statutory control, congress can aim to limit bureaucratic drift before it occurs by exerting influence over the organization of a bureaucracy. Congress exerts statutory control by specifying the bureaucracy's agenda, organization, time and fiscal constraints, and procedures while leaving little discretion up to the bureaucracies.