apply risk based compliance activity to the collection of WRIT in the same way as is applied to the collection of income tax from taxpayers in the rest of the UK
cymhwyso gweithgarwch cydymffurfiad seiliedig ar risg at y gwaith o gasglu CTIC yn yr un modd ag y’i cymhwysir at y gwaith o gasglu treth incwm gan drethdalwyr yng ngweddill y DU