The Board of Trustees shall assess each member of the fire insurance patrol not to exceed 5% of his wages or salary, which assessment shall be uniform as to all members of the patrol. The amount so assessed shall be deducted and withheld by the Board of Underwriters, or the committee of the Board of Underwriters having charge of the fire insurance patrol, from the pay of each such member of the patrol at such times as the members of the patrol shall be paid their wages or salaries, and shall be at once paid into the pension fund.
     The Patrol Committee of the Board of Underwriters of such city, village or incorporated town, shall also set aside and pay into such pension fund not to exceed 10% of all moneys paid to such Board of Underwriters by insurance companies for sustaining the fire insurance patrol. Such percentage shall not be less than twice the percentage of the assessment against the members of the patrol.