A Local Law to amend the administrative code of the city of New York, in relation to authorizing a change in the name of the Flatbush Avenue business improvement district, an increase in the amount to be expended annually in such district, an extension of the boundaries of such district, a change in the method of assessment upon which the district charge in such district is based, and an increase in the maximum total amount to be expended for improvements in such district, and providing for the dissolution of the Church Avenue business improvement district