(1) At no time may more than seventy-five percent of the portfolio of either fund be invested in securities described in subdivision (7), section eleven of this article;
(2) At no time may more than twenty percent of the portfolio of either fund be invested in securities described in subdivision (7), section eleven of this article which mature within one year from the date of issuance thereof;
(3) At no time may more than nine percent of the portfolio be invested in securities issued by a single private corporation or association;
(4) At no time may more than sixty percent of the portfolio be invested in equity mutual funds under subdivision (10), section eleven of this article;
(5) Notwithstanding any other provision of this article, any investments in equity mutual funds under subdivision (10), section eleven of this article by a policemen's pension and relief fund or a firemen's pension and relief fund shall be in a securities and exchange commission registered no sales-load equity mutual funds whose stated investment policy requires investment in a portfolio of securities which are at least eighty-five percent in New York Stock Exchange instruments and requires multi-industry diversification: Provided, That the value of such investments shall not exceed the lesser of: (a) One percent times completed months since enactment of this section; or (b) fifty percent of the total assets of said pension and relief fund.