The panel has 14 members from the BJP and five from Congress. It also has two members each from JD(U), TMC and DMK, and one member each from SP, IUML, Shiv Sena, NCP (SP), NCP and TDP.
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.