Conversion of foreign driving licence as indian driving licence

Many Indians who work in foreign countries obtain a driving licence there and come to India
They have a valid licence issued by another country which is valid only in the country of issue
How do they convert their foreign licence as an Indian licence.
The Motor vehicles' Act provides a way for that
Section 9 (3) (a) (iii) of M V act stipulates that when a person obtains a driving licence in another country they could submit their licence to a RTO office and obtain a new indian licence without undergoing test, llr and other formalities.
In other words they may submit their foreign licence to an office with forms for llr,fresh licence, medical certificate and proper fees and they will be issued a new Indian licence .

For this they need not wait for one month or undergo any test.
On presentation of foreign licence with necessary forms and fees fresh driving licence can be issued straightaway for the class of vehicles for which they hold their foreign licence.