as per my knowledge, you should show appointment letters/job experience letters etc for your latest 4+ (shoyld be 5) years, if your job experience is more then that then i guess you can just mention the job with atleast one proof of your job. because as they say in the SCHEDULE 3 "4 years or more" it SEEMS they will be tracking only 4+ years.
Hope that helps
Seniors please correct me if i am wrong.
Regards,
Pankaj