Русско-англо-русский юридический словарь

A party or the legal representative of a party, on behalf of and upon the instructions of that party, may communicate information relating to the proceedings to any person where necessary to enable that party [...] (legislation.gov.uk)

Upon the instructions of the NTC, we are temporarily shutting down services in parts of @iloilocitygov and nearby areas of @iloiloprovince where #Dinagyang2019 festivities are being held from early morning of Jan 26 to Jan 27, 2019. (Smart Newsroom)

They were acting upon the instructions of senior managers. (Macmillan Dictionary)