The answer given by U. Janani is wrong. If your father's law degree was awarded prior to the academic year 2009-10, there is no need to appear for the All India Bar Examination in order to qualify to practice law in India. The relevant date is that of awarding of LLB degree and not enrolment date. Since, your father passed his LLB in 2002, he would not have to give AIBE exam even if get himself enrolled in 2019. Read the answer to FAQs on the website of BCI. More particularly answer to FAQ No.3. The link is:

http://www.barcouncilofindia.org/about/first-all-india-bar-examination/all-india-bar-examination-frequently-asked-questions/

FAQ No.3: I have a degree in law and am currently not practicing. In a few years, however, I intend to enrol myself as an advocate and practice law. Will I have to appear for the All India Bar Examination at such time?

Answer: No. The examination notification only applies to students graduating from academic year 2009-10 onwards. If your law degree was awarded prior to 2009-10, there is no requirement to appear for the All India Bar Examination in order to qualify to practice law in India.

If you still have doubt, send an RTI application to Bar Council of India with your question. You will get the official reply.

Hi Nidhi!

If your father wants to pratice Law in any Indian Court he has to register himself by clearing All India Bar Examination (AIBE)! He can appear for AIBE as there is no Maximum Age Limit. If he has completed his Graduation prior to the Academic year 2009-2010, then he need not appear for AIBE.

He can practice Law before clearing AIBE if he has registered himself with the State Bar Council. But, he'll have only 2 years from the date of registration, within which he'll have to clear AIBE!

Hope this is helpful!

All the best!