All laws to the contrary notwithstanding, every political subdivision of this state which employs full-time firefighters shall adopt policies or regulations which will provide for deductions from the salaries of its firefighters or groups of firefighters whenever a written request for such deductions is submitted to the governing body of the (employer) political subdivision. Such deductions shall be made on a monthly basis and shall be remitted to the appropriate company, association or organization as specified by the employees within 10 days following each deduction. Such deductions may be made for, but not limited to, tax sheltered annuities, membership dues, the Public Employees' Individual Retirement Account Fund, voluntary contributions and group insurance premiums. Deductions for membership dues shall be made based upon membership lists and forms provided by the employees' organization. Such lists are to be corrected, updated and returned to the employees' designated organization(s) not later than April 15 of each year. The 1984 dues and voluntary contribution authorized, with appropriate yearly adjustments, shall be deducted for each succeeding year unless the employee revokes the deductions in writing on or before January 2 of that year. Voluntary contributions may be revoked by giving a 30-days notice in writing. New authorization shall be permitted to be added during the months of April, August and December of each year. Upon termination, amounts owed under the authorization of the employee shall be deducted from the employee's final pay due.