The written trust agreement for each retirement system shall contain all of the following provisions consistent with this act:

    (a) Recitals describing the creation and purpose of the trust.

    (b) Language reflecting the requirements of sections 4 through 7.

    (c) Sections outlining the management and operation of the trust.

    (d) A description of the various accounts that carry out the functions of the trust.

    (e) Provisions setting forth the powers and duties of the trustees.