All ordinances of a temporary or special nature (including, but not limited to, tax levy ordinances; appropriation ordinances; ordinances relating to boundaries and annexations; franchise ordinances and other ordinances granting special rights to persons or corporations; contract ordinances and ordinances authorizing the execution of a contract or the issuance of warrants; salary ordinances; ordinances establishing, naming or vacating streets, alleys or other public places; improvement ordinances; bond ordinances; ordinances relating to elections; ordinances relating to the transfer or acceptance of real estate by or from the city; and all special ordinances) as well as any other ordinances pertaining to subjects not enumerated and embraced in this code of ordinances, shall remain in full force and effect unless herein repealed expressly or by necessary implication.