Dear Mr.Agarwal,
I feel there are two, three issues that we need to look at.
1. The returns are filed with wrong information. i.e. his status has been shown as resident instead of Non-resident for couple of years.
2. So in the initial year, he would become "Resident but not Ordinarily resident" and then "Non-Resident". In these cases, Income earned out of India, need not be taxed. But you need to look at what happened to his first year of travel. i.e. when he went out of India. For that year, there can be a possibility, he would been resident (if he has left in the 2nd half of the year) (more than 181 days in India). If he can be resident, then world wide income has to be taxed in India (but necessary credits can be taken for the taxes paid abroad)
3. But the issue can be sorted out for couple of years by revising the return, if the returns are filed with in the due date and if it is not time barred as per Sec 139 (5).
4. As for as remittance out of India is concerned, it is governed by the RBI regulations, which prescribes the limits and permission requirement based on the purpose of remittance whether it is Current or Capital Account Transaction.
I hope the above helps.
Sivakumar.K