Non resident director

i am planning to form a private limited company for m y client. there are two female directors who are resident in india.  Now they want to admit one non resident indian citizen in to the proposed compny.  the non resident is working in US.

my question is :

   Can we admit the non resident by giving 20% share in the private limited co

   can the non resident brought mony from aborad and  contribute to his share

   is there any restriction in bringing the money from US to India.

  whether we have to obtain any permission from Central Govt or RBI

pls advise