+ int ReadTariffs () override;
+ const Tariff * FindByName(const std::string & name) const override;
+ const Tariff * GetNoTariff() const override { return &noTariff; }
+ size_t Count() const override;
+ int Del(const std::string & name, const Admin * admin) override;
+ int Add(const std::string & name, const Admin * admin) override;
+ int Chg(const TariffData & td, const Admin * admin) override;