The correct answers are: mass meeting and committee.
The committee makes the required regulations taking into account the data/information they've collected from the mass meeting.
A mass meeting is a type of assembly, which is announced with an specific aim in mind (such as discussing how to take appropriate action on a particular problem). They are open to everyone interested in the stated problem or purpose.
As for the committee, its main role is to consider or draft the legislation that has been proposed in the mass meetings in detail.
there are many answers to this question, such as a diplomat, ambassador, soldier, united nations employee, cia, etc.