Section 71. At least five percent of the total assets of a credit union shall be carried as cash on hand or in the following investments which shall be the absolute property and shall be under the control of the credit union or be held by book entry procedure when required. Whenever the aforesaid ratio falls below five percent of the total assets of a credit union, no further loans shall be made until the ratio as herein provided has been reestablished.

(a) Shares in the Central Credit Union Fund, Inc.

(b) Shares in a federally chartered corporate credit union.

(c) Deposits in savings banks incorporated in the commonwealth.

(d) Paid-up shares and accounts of and in cooperative banks incorporated in the commonwealth.

(e) Shares of savings and loan associations incorporated in the commonwealth.

(f) Balances due from banks and trust companies or banking companies which are members of the Federal Deposit Insurance Corporation.

(g) Shares of federal savings and loan associations having a usual place of business within the commonwealth.

(h) Bonds or notes of the United States or of any state or subdivision thereof with a maturity of up to five years.

(i) Bonds or notes of other federal agencies which are on the list of legal investments prepared pursuant to section fifteen A of chapter one hundred and sixty-seven with a maturity of up to three years.

(j) Repurchase agreements secured by United States government obligations up to one year maturity.

(k) In a common trust unit plan organized for the purchase of bonds or notes of the United States or of any subdivision thereof which are on the list of legal investments prepared pursuant to said section fifteen A of said chapter one hundred and sixty-seven and which has as its custodian a banking institution authorized to accept deposits from a credit union or from a savings bank.

(l) Securities of the government national mortgage association.

(m) Federal funds.

(n) In any bonds or notes which are on the list of legal investments prepared pursuant to said section fifteen A of said chapter one hundred and sixty-seven with a maturity of up to three years; provided, however, that such bonds or notes are rated as, A, AA, or AAA.

(o) Certificates of deposits of up to one year maturity which otherwise meet the criteria set out in paragraphs (a) to (i), inclusive, or paragraph (q) of section sixty-seven.