The Companies Act has not prescribed any age limit on a person to become a Director of the Company.
A person can be appointed as the the Managing Director / Whole time Director / Manager even if he has attained the age of 70 years, by taking shareholders approval by passing of a special resolution in a general meeting.
The Central Government approval will not be required further if the company takes shareholders approval as said above.
No nationality specific restrictions under the said Act as to the appointment of Directors.
How to find the details of Directors of a company in India
The Directors' details of any Company in India is made available at the MCA - Ministry of Corporate Affairs's site. Watch this video tutorial on how to find the Directors' details in MCA site: youtube.com/watch?v=-tbasCHLVno