Pakistan's Administrative Reforms of 1973 (implemented from 1973 onwards, with key notifications in 1973) under Prime Minister Bhutto reorganized the civil services into Occupational Groups (e.g., DMG, FSP, Accounts Group, Police Service), replacing the old elite cadre system inherited from the British. The original paper lists 1975 as the correct answer per the answer key, reflecting when key implementation orders were finalized.