I could not find any guidelines for 7th year extension with the DOL PERM Program. In the six month period - less than 365 days but more than 180 days from the expiry of the six-year limit on my H1B, my company started the PERM process. In that six month period we got an approved I-140 and filed for Adjustment of Status. Would I qualify for 7th year extension ? Please note that I am a citizen of India and I thought there was also a provision for "Per Country Limit".
If you have an I-140 approval and your PD is backed up, you are entitled to a three-year H-1 extension beyond six years. It does not matter when your PERM was filed.