Pointing out that more than 90 per cent of Nagaland's population is Christian, Rio said churches have historically played a vital role in the state's spiritual and community life.
Responding to remarks by US Congressman Riley Moore, Ministry of External Affairs spokesperson Randhir Jaiswal said legislative matters concerning India are not open to external scrutiny.
The proposed law, opposed by political parties, church groups and NGOs, would let the Centre control assets of organisations losing FCRA registration, with the government considering changes.
Congress said that the proposed bill was "detrimental" to Christians and NGOs, calling for urgent steps to ensure Mizoram formally records its opposition.
The FCRA Bill was introduced during the Budget session but was not taken up for passage due to opposition from certain quarters in Kerala ahead of the state's Assembly elections.
