5-1-7: MUTUAL AID:
   A.   Authority To Provide Assistance; Written Request: The chief of police, or his designated representative, is authorized to direct that any regularly employed police officers of the city may provide law enforcement assistance to another municipality in an emergency; provided, that a written request from an official representative of the other municipality has been received and approved by the city.
   B.   Salaries, Benefits: While serving in said capacity, the city shall provide salaries, insurance and other regular benefits to these officers.
   C.   Authority To Request Assistance From Others: The mayor or police chief of the city is also authorized to request law enforcement assistance from other municipalities, in emergency situations. In such cases, the assisting officers of the other municipalities shall have all of the same powers and duties as fully as if employed by the city; however, salaries, insurance and other benefits shall not be paid by the city of Elgin.
   D.   Return To Regular Duties:
      1.   In all events, the police officers of the city shall return to their regular duties when directed to do so by the Elgin police chief or the police chief of the requesting municipality, whichever direction occurs first.
      2.   When the Elgin police chief shall direct, the assisting police officers of the other municipalities shall return to their own regularly scheduled duties in their own municipalities, and those assisting police officers shall cease to have the powers and duties of police officers regularly employed by the city of Elgin. (1991 Code § 1-33)