In the context of light touch contracts, this could arise when the application of a particular legislative regime means that a contract can be awarded only to one specific provider.
Yng nghyd-destun contractau cyffyrddiad ysgafn, gallai hyn godi pan fydd defnyddio cyfundrefn ddeddfwriaethol benodol yn golygu mai dim ond i un darparwr penodol y gellir dyfarnu'r contract.