The State and prefectures must take legislative and other measures necessary to ensure that notifications and other acts made to the mayor of the municipality (including the head of a special ward; the same applies hereinafter) or another executive body of the municipality, concerning a change in the address, household, or householder of a resident of the municipality, and any resulting change in the rights or obligations of the resident, or any other change in status as a resident (referred to collectively in paragraph (3) of the following Article and Article 21-4 as a "notification of a change in status as a resident"), are all carried out by a single act, and that the processing of affairs concerning residents is all carried out based on the basic resident register.