The western area of Taguig, coterminous with the Second Councilor District of Taguig (for the purpose of electing municipal, now city, council members), was separated from the congressional district of Pateros–Taguig by virtue of Republic Act No.
Republic Act No. delineated that the western part of Taguig, which forms the Second Councilor District for municipal or city council elections, was distinct from the Pateros-Taguig congressional district.