Any transactions and use taxes ordinance adopted pursuant to this article shall be operative on the first day of the first calendar quarter commencing more than 90 days after the effective date of this article, or January 1, 1970, whichever is later.

Prior to the operative date of the ordinance, the district shall contract with the State Board of Equalization to perform all functions incident to the administration and operation of the ordinance.

If the district shall not have contracted with the State Board of Equalization prior to the operative date of its ordinance, it shall

nevertheless so contract and in such case the operative date shall be the first day of the first calendar quarter following the execution of the contract.

The contract entered into by the district with the State Board of Equalization prior to January 1, 1978, for the administration and operation of the transactions and use tax ordinance shall be amended to provide for the allocation of the transactions and use tax revenues pursuant to Section 29142.2.