52. If, immediately before the reorganization of the city whose territory corresponds to the urban agglomeration, an urban agglomeration power belongs to a municipal body and the power is neither temporary nor revocable, it is not conferred on the central municipality.
A power is deemed revocable if it is exercised by a body established by the city which may be dissolved by order or at the sole request of the city.
The first paragraph does not apply during the period in which, under the law applicable immediately before the city is reorganized, the central municipality and the municipal body simultaneously exercise jurisdiction over the same matter.