(c) where the housing accommodation is owned by a hospital, convent, monastery, asylum, public institution, college, school dormitory or any institution operated exclusively for charitable or educational purposes on a non-profit basis and either:
(i) the tenant's initial tenancy commenced after the owner acquired the property and the owner requires the unit in connection with its charitable or educational purposes including, but not limited to, housing for affiliated persons; provided that with respect to any tenant whose right to occupancy commenced prior to July first, nineteen hundred seventy-eight pursuant to a written lease or written rental agreement and who did not receive notice at the time of the execution of the lease that his or her tenancy was subject to non-renewal, the institution shall not have the right to refuse to renew pursuant to this subparagraph; provided further that a tenant who was affiliated with the institution at the commencement of his or her tenancy and whose affiliation terminates during such tenancy shall not have the right to a renewal lease; or
(ii) the owner requires the unit for a non-residential use in connection with its charitable or educational purposes; or
(d) on specified grounds set forth in the code consistent with the purposes of this law; or
(e) where a tenant violates the provisions of paragraph twelve of this sub- division.