A group of officer trainees of the 70th Batch of Indian Revenue Service today called on the President Pranab Mukherjee at Rashtrapati Bhavan in New Delhi. <br/><br/>Speaking on the occasion, the President expressed happiness that officer trainees of this batch are from diverse social and cultural backgrounds from all parts of India. He congratulated all of them for qualifying Civil Services Examination.<br/><br/>Mr Mukherjee said, they have embarked upon a challenging career by joining Indian Revenue Service and no other service thrusts such huge responsibly on young shoulders as the civil services. <br/><br/> <br/><br/><br/>The President said, the duty of tax collection is a sovereign function of the State. He said, role of civil servants has transformed from being regulators and administrators to being facilitators. Mr Mukherjee said, the probationers are the policy makers of the future. He wished them all success in their future endeavors.