Mae arfer y pŵer cyffredinol at ddiben masnachol yn ddarostyngedig i amodau a nodir yn adran 27 o'r Ddeddf, gan gynnwys y gofyniad i fasnachu drwy gwmni. Mae adran 28 o'r Ddeddf yn rhoi pŵer i Weinidogion Cymru wneud rheoliadau i ddarparu bod arfer y pŵer cyffredinol yn ddarostyngedig i amodau (pellach). Daeth Rheoliadau Pŵer Cymhwysedd Cyffredinol (Diben Masnachol) (Amodau) (Cymru) 2021 (“Rheoliadau 2021) i rym ar 1 Tachwedd 2021 ac yn ei gwneud yn ofynnol i brif gynghorau baratoi a chyhoeddi achos busnes cyn iddynt arfer y pŵer at ddiben masnachol a gofynion cysylltiedig eraill. Gan fod y pŵer cyffredinol yn mynd i gael ei ymestyn i gynghorau cymuned cymwys o 5 Mai 2022, mae Rheoliadau 2021 wedi'u diwygio i ymestyn gofynion Rheoliadau 2021 i gynghorau cymuned cymwys.
The exercise of the general power for a commercial purpose is subject to conditions set out in section 27 of the Act, including the requirement to trade through a company. Section 28 of the Act provides the Welsh Ministers with a power to make regulations to provide for the exercise of the general power to be subject to (further) conditions. The General Power of Competence (Commercial Purpose) (Conditions) (Wales) Regulations 2021 (“2021 Regulations”) came into force on 1 November 2021 and require principal councils to prepare and publish a business case before they exercise the power for a commercial purpose and other connected requirements. As the general power is to be extended to eligible community councils from 5 May 2022, the 2021 Regulations have been amended to extend the requirements of the 2021 Regulations to eligible community councils.