 El Salvadors antitrust authority said on Tuesday it will allow an expanded market share for telecommunications firm Claro, a unit of Mexicos America Movil, on guarantees that it will abide by competition and consumer protection safeguards. America Movil, controlled by the family of Mexican tycoon Carlos Slim, aims to acquire for 315 million two units of Spains Telefonica that operate in the Central American country which could generate limits on competition, El Salvadors Competition Superintendent SC said in a statement. The two Telefonica units are Telefonica Moviles El Salvador and Telefonica Multiservicios, both of which operate under the Movistar brand and belong to Telefonica Centroamerica Inversiones. 