Section 18
SEC. 18. Audit. ─ The Chairman of the Commission on Audit shall act as the ex-officio auditor of the Fund and, accordingly, is empowered to appoint a representative and other subordinate personnel to perform and report on such audit duties, responsible to and removable only by the Commission on Audit Chairman, without prejudice, however, to the power of the Board of Trustees to contract for another mode of independent audit service, in addition to that provided by the Commission Audit.