"Compulsory process" in regard to any investigating committee means any one or any combination of the following:
(a) Exercise of the power of subpoena or subpoena duces tecum;
(b) Administration of oath or affirmation;
(c) Taking of testimony under oath;
(d) Referral of any contempt of legislature for prosecution;
(e) Referral of any perjury for prosecution;
(f) Any other act related to any of the foregoing.