Service tax and exim code - do i need it?

Hi, 

My queries are as follows:

1) Service Tax Registration - I am providing IT services to clients outside India by remotely working for them in India. We work as a small team and are looking to make our business a Pvt. Ltd. company. We have no income from India. All income comes to our bank accounts in foreign currency ( TT transfer) and gets converted to INR in our Indian bank. Do i need to get a service tax registration? Since my understanding is that such transaction may not fall at all under service tax bracket at this stage? If so how can we get exemption in our return filing for this? Please advise?

2) EXIM code - Are we obligated to register as Exporter of services and obtain an EXIM code. We are not part of any STPI or SEZ.  Please advise?

3) Are we obliged to do any other registration with or notify  to the Indian goverment agencies/ departments?

Thanks, 

Jas