Sec. 2. PARTICIPATION IN FUND; WAGE DEDUCTIONS. Each member fireman and policeman in the employment of such city or town must participate in said fund, except in times of national emergency those persons as are employed during that time shall not be required to participate in the fund, and said city or town shall be authorized to deduct a sum of not less than one per cent (1%) nor in excess of six per cent (6%) of his wages from each month to form a part of the fund known as the Firemen and Policemen Pension Fund, except that the city or town shall deduct a sum less than one per cent (1%) or more than six per cent (6%) of the member's wages each month to form a part of the fund if the board of trustees of that fund increases or decreases the percentage of wages to be contributed to the fund under the provisions of Section 10A or 14A of this Act. The amount to be deducted from the wages of those named above who must participate in the fund is to be determined by the board of trustees as provided for in Section 1 of this Act within the minimum and maximum deductions herein provided or as otherwise provided under the provisions of Section 10A or 14A of this Act.