Temporary permits for public utilities, revocable at any time at the will of the council, may be granted by the council by resolution on such terms and conditions as it shall determine, provided that such permits shall in no event be construed to be franchises or amendments to franchises. All temporary permits shall be subject to the rights of the city to make independent audit and examination of accounts at any time and to require reports annually or at more frequent intervals as prescribed by resolution of the council. When the council deems it in the public interest, such permits may be exclusive.