What is the main function of the regional council according to the text?
The main function of the regional council, according to the text, is to establish a governing body for the Tuensang district. This includes determining its composition, the qualifications and term of office for its members, as well as their salaries and allowances. Additionally, the regional council will be responsible for setting rules and procedures for conducting business, appointing officers and staff, and handling any other necessary matters for its proper functioning.