represent(в тексте доверенности: X hereby authorizes and appoints Y to represent X at the Ministry of Justice (X доверяет Y представлять интересы X в министерстве юстиции) Leonid Dzhepko)
act on behalf of(Proprietor's Agent will be authorised to act on behalf of the Proprietor in respect of all matters arising out of or in connection with this Agreement and to sign the Agreement on behalf of the Proprietor.4uzhoj)