<prompt> Translate the following text to EnglishKabla ya OPM kurekebisha kanuni zake juu ya mifumo ya usimamizi wa utendaji wa mtendaji mwandamizi, BLM, FHWA, IRS na VBA zilianzisha mifumo.  <response>: Prior to OPM amending its regulations on senior executive performance management systems, BLM, FHWA, IRS, and VBA implemented systems 