It all depends on the business of your client company. Depending on the business there are three categories. [i]. There are categories of business where foreign direct investment [FDI] is prohibited.[ii] categories of business where FDI is permitted upto certain percentage with prior approval of Foreign Investment Promotion Board [FIPB]. [iii] FDI is permitted automatically either fully or upto certain percentage [Called Cap On Investment] without any approval. In this case, after investment certain particulars are to be submitted to RBI and certain other particulars periodically. If the FDI is needed to exceed this cap, again, application has to be made to FIPB which may not approve of the same or approve the same with certain conditions.
Here FDI means Investment by foreigners or foreign bodies and Foreign Nationals but Persons of Indian Origin [PIO] and NRI Indian Residents.