No need to re apply whose already applied for January Notification. Only new persons need to apply to this notification.
Educational qualifications required to these posts are S.S.C. with I.T.I .
Age should be below 18 to 35 years.
Selection process is purely defends on written test and Trade test.
No certificate needed for whose joined after January 1st 2011 as Contract Labour.
For more details you can see www.apgenco.gov.in