Assessment, adjudication, notice etc. not to be invalid on minor grounds :
No assessment, re-assessment, adjudication, review, revision, appeal, rectification, notice, summons or other proceedings done, accepted, made, issued, initiated, or purported to have been done, accepted, made, issued, initiated in pursuance of any of the provisions of the Act shall be invalid or deemed to be invalid merely by reason of any mistake, defect or omission therein, if such assessment, re-assessment, adjudication, review, revision, appeal, rectification, notice, summons or other proceedings is/are in substance and effect in conformity with or according to the intents, purposes and requirements of the Act or any earlier law – section 160(1) of CGST Act.