S. 147 : Reassessment-After the expiry of four years-No failure to disclose material facts-Sales promotion expenses-Gift expenses-Health care professionals-Change in law subsequently-Reassessment notice and order disposing the objection is quashed. [S. 148, Art. 226, Medical Council of India Act, 1956, The Indian Medical Council (Professional Conduct, Etiquette and Ethics) Regulations, 2002.]