The volunteer fire department is hereby authorized to answer certain fire calls and to combat fires outside of the corporate limits under the following conditions and agreements:
A. Provided that applications are made to the mayor and common council for fire protection, and applicant enters into an acceptable written contract with the city for fire protection and deposits with the city clerk such sum as the contract shall provide, which sum will be used to defray the cost of providing fire equipment and firemen at applicant's premises, for one fire call only, and provided further that such contract provides that there shall be no liability against the city under any circumstance arising out of said contract, or any action taken or failure to act by said fire department or any member thereof.
B. Provided that no fire is in progress within the city limits at the time of the call, and provided further, that the said fire department shall return within the city to give fire protection against any fire that may occur in the city while the department is fighting a fire outside the corporate limits.
C. Provided that the fire insurance rates within the limits of the city are not affected by the fire truck leaving the city.
D. Provided that the said vehicle shall not proceed a distance of more than one-half (1/2) mile beyond the corporate limits of the city in making any call to fight any fire under this chapter. (1972 Code)