Either or both resolutions provided for in this chapter may be adopted by the legislative body. If both resolutions are adopted, they shall clearly specify the areas within the city within which, or the projects over which, the authority and the city, respectively, are to have jurisdiction and control. The division of jurisdiction and control shall be as specified, but may be changed from time to time to such extent as is consistent with obligations to bondholders, by action of both the legislative body and the authority.