There is hereby levied and there shall be collected from every person, firm, association or corporation pursuing any trade, profession, calling, avocation, occupation and other business now subject to the state license or occupation tax, an occupational tax as provided by the general laws of the state.
The annual license or occupation tax shall be equal in each instance to one-half the state license or occupation tax (unless a lesser amount has been legally established by city ordinance for specific occupations), which said taxes shall be paid annually in advance except where otherwise provided by the state laws, in which event the same may be paid as is provided by the state law.