S. 226 : Collection and recovery-Stay of demand-Pendency of appeal before CIT(A)-CBDT Circular-No statutory requirement of pre-deposit under the Act-Direction to deposit 20% of disputed demand based solely on CBDT Office Memorandum dated 31-7-2017-Executive instructions cannot override or impose conditions contrary to statute-Where serious prejudice likely and case treated as non-priority by Department, exemption from pre-deposit ought to be granted-Order rejecting stay set aside and recovery and penalty proceedings stayed [S. 119, 246A, 250, 271F, 274; Art. 226]