Amendment to Central Excise notification removes specified entry for MRO aircraft units, simplifying procedural treatment. Amendment to Notification No.12/2012-Central Excise omits the entry in column (5) against serial number 305, thereby modifying the scheduled exemption or procedural provision applicable to units engaged in Maintenance, Repair and Overhaul of aircraft; the change is made under the government's statutory authority to amend notifications in the public interest.