EPF Applicability In Unaided School In Delhi

respected seniors,
please advise from which year unaided schools in delhi were taken within the ambit of employee pension fund scheme.
Is it 1980 or 1984?
regards
sukhi

Respected Seniors
In January tbis year I sought information regarding eligibility of pension to teachers in Unaided Public Schools. I visited EPFO Wazirpur Delhi as well as Dwarka, New Delhi. I gathered that EPFO Wazirpur considers 1984 while Dwarka office takes it at 1987. May I request for clarifications, if available with any Seniors?
regards
Sukhi