An employee, whether contractual or otherwise, is required to be a member of the PF irrespective of age. Please note that contract employees are not excluded in the definition of an employee as given in sec. 2(f) of the PF Act.
However, if you go through the provisions of the PF scheme, there is a provision under para 2(f) in which the excluded employee has been defined. Mr. Varghesema Thew and Mr. Kargaonkar Ji have explained in detail about the provision, which will help you decide whether the concerned employee is an excluded one or not under the provisions of the PF Act/Scheme.
I would like to point out one more thing: in case you find that the concerned employee is an excluded employee, please obtain his PF clearance details with supporting evidence and keep it in your records. Also, obtain a letter from the concerned employee declaring that he has crossed the age of 55 years and has taken his full amount of PF accumulation in the fund as per clause (a) or (c), as the case may be, and is not willing to be a member of PF. Keep this in your records for future reference; this may be required by the Authorities at the time of inspection, etc.
Regards,
Pkjain