S. 282 : Service of notice –Reassessment-Service of notice at the factory premises of the Assessee on the security guard was held to be valid ,though “service” of notice u/s 147/148 is not a mere procedural requirement, but a condition precedent for initiation of proceedings, the service upon a person who was not authorized to receive notice does not render the proceedings null and void if the assessee complied and entered appearance [ S. 148 , 254(1),292B ]