Diben y diwygiadau yw cywiro diffygion mewn deddfwriaeth sy'n codi wrth i'r DU ymadael â'r Undeb Ewropeaidd, mewn perthynas ag ymchwiliadau cyhoeddus. Bydd y rheoliadau yn newid cyfeiriadau at “EU obligations” ac “enforcable EU obligations” i “retained EU obligations” a “retained enforcable EU obligations”.
The purpose of the amendments is to correct deficiencies in legislation arising from the UK leaving the European Union in relation to public inquiries.  The regulations will replace references to “EU obligations” and “enforceable EU obligations” with “retained EU obligations” and “retained enforceable EU obligations”.